Doping Dependence of Collective Spin and Orbital Excitations in the Spin-1 Quantum Antiferromagnet La2-xSrxNiO4 Observed by X Rays

Fabbris, G.; Meyers, D.; Xu, L.; Katukuri, V. M.; Hozoi, L.; Liu, X.; Chen, Z. -Y.; Okamoto, J.; Schmitt, T.; Uldry, A.; Delley, B.; Gu, G. D.; Prabhakaran, D.; Boothroyd, A. T.; van den Brink, J.; Huang, D. J.; Dean, M. P.  M.

doi:10.1103/PhysRevLett.118.156402

Title: Doping Dependence of Collective Spin and Orbital Excitations in the Spin-1 Quantum Antiferromagnet ${La}_{2 - x} {Sr}_{x} {NiO}_{4}$ Observed by X Rays

Abstract

Here, we report the first empirical demonstration that resonant inelastic x-ray scattering (RIXS) is sensitive to collective magnetic excitations in S=1 systems by probing the Ni L₃ edge of La_2$$-$$xSr_xNiO₄ (x=0, 0.33, 0.45). The magnetic excitation peak is asymmetric, indicating the presence of single and multi-spin-flip excitations. As the hole doping level is increased, the zone boundary magnon energy is suppressed at a much larger rate than that in hole doped cuprates. Based on the analysis of the orbital and charge excitations observed by RIXS, we argue that this difference is related to the orbital character of the doped holes in these two families. Lastly, this work establishes RIXS as a probe of fundamental magnetic interactions in nickelates opening the way towards studies of heterostructures and ultrafast pump-probe experiments.

Authors:

Fabbris, G. ^[1]; Meyers, D. ^[1]; Xu, L. ^[2]; Katukuri, V. M. ^[2]; Hozoi, L. ^[2]; Liu, X. ^[3]; Chen, Z. -Y. ^[4]; Okamoto, J. ^[4]; Schmitt, T. ^[5]; Uldry, A. ^[6]; Delley, B. ^[6]; Gu, G. D. ^[1]; Prabhakaran, D. ^[7]; Boothroyd, A. T. ^[7]; van den Brink, J. ^[2]; Huang, D. J. ^[8]; Dean, M. P. M. ^[1]

Brookhaven National Lab. (BNL), Upton, NY (United States). Condensed Matter Physics and Materials Science Dept.
Leibniz Inst. for Solid State and Materials Research (IFW), Dresden (Germany)
Chinese Academy of Sciences (CAS), Beijing (China). Beijing National Lab. for Condensed Matter Physics and Inst. of Physics; Collaborative Innovation Center of Quantum Matter, Beijing (China)
National Synchrotron Radiation Research Center, Hsinchu (Taiwan)
Paul Scherrer Inst. (PSI), Villigen (Switzerland). Synchotron Radiation and Nanotechnology Research Dept.
Paul Scherrer Inst. (PSI), Villigen (Switzerland). Condensed Matter Theory Group
Univ. of Oxford (United Kingdom). Clarendon Lab., Dept. of Physics
National Synchrotron Radiation Research Center, Hsinchu (Taiwan); National Tsing Hua Univ., Hsinchu (Taiwan). Dept. of Physics

Publication Date:: Wed Apr 12 00:00:00 EDT 2017

Research Org.:: Brookhaven National Laboratory (BNL), Upton, NY (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

OSTI Identifier:: 1351735

Alternate Identifier(s):: OSTI ID: 1351704

Report Number(s):: BNL-113724-2017-JA
Journal ID: ISSN 0031-9007; PRLTAO; R&D Project: PO011; KC0201060; TRN: US1700539

Grant/Contract Number:: SC00112704; 104747; 2015CB92130; XDB07020200; 1047478

Resource Type:: Accepted Manuscript

Journal Name:: Physical Review Letters

Additional Journal Information:: Journal Volume: 118; Journal Issue: 15; Journal ID: ISSN 0031-9007

Publisher:: American Physical Society (APS)

Country of Publication:: United States

Language:: English

Subject:: 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 36 MATERIALS SCIENCE

Citation Formats


                    Fabbris, G., Meyers, D., Xu, L., Katukuri, V. M., Hozoi, L., Liu, X., Chen, Z. -Y., Okamoto, J., Schmitt, T., Uldry, A., Delley, B., Gu, G. D., Prabhakaran, D., Boothroyd, A. T., van den Brink, J., Huang, D. J., and Dean, M. P.  M. Doping Dependence of Collective Spin and Orbital Excitations in the Spin-1 Quantum Antiferromagnet La2-xSrxNiO4 Observed by X Rays.  United States: N. p., 2017. 
Web.  doi:10.1103/PhysRevLett.118.156402.

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                    Fabbris, G., Meyers, D., Xu, L., Katukuri, V. M., Hozoi, L., Liu, X., Chen, Z. -Y., Okamoto, J., Schmitt, T., Uldry, A., Delley, B., Gu, G. D., Prabhakaran, D., Boothroyd, A. T., van den Brink, J., Huang, D. J., & Dean, M. P.  M. Doping Dependence of Collective Spin and Orbital Excitations in the Spin-1 Quantum Antiferromagnet La2-xSrxNiO4 Observed by X Rays.  United States.  https://doi.org/10.1103/PhysRevLett.118.156402

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                    Fabbris, G., Meyers, D., Xu, L., Katukuri, V. M., Hozoi, L., Liu, X., Chen, Z. -Y., Okamoto, J., Schmitt, T., Uldry, A., Delley, B., Gu, G. D., Prabhakaran, D., Boothroyd, A. T., van den Brink, J., Huang, D. J., and Dean, M. P.  M. Wed .  
"Doping Dependence of Collective Spin and Orbital Excitations in the Spin-1 Quantum Antiferromagnet La2-xSrxNiO4 Observed by X Rays".  United States.  https://doi.org/10.1103/PhysRevLett.118.156402.  https://www.osti.gov/servlets/purl/1351735.

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@article{osti_1351735,

  title        = {Doping Dependence of Collective Spin and Orbital Excitations in the Spin-1 Quantum Antiferromagnet La2-xSrxNiO4 Observed by X Rays},

  author       = {Fabbris, G. and Meyers, D. and Xu, L. and Katukuri, V. M. and Hozoi, L. and Liu, X. and Chen, Z. -Y. and Okamoto, J. and Schmitt, T. and Uldry, A. and Delley, B. and Gu, G. D. and Prabhakaran, D. and Boothroyd, A. T. and van den Brink, J. and Huang, D. J. and Dean, M. P.  M.},

  abstractNote = {Here, we report the first empirical demonstration that resonant inelastic x-ray scattering (RIXS) is sensitive to collective magnetic excitations in S=1 systems by probing the Ni L3 edge of La2$-$xSrxNiO4 (x=0, 0.33, 0.45). The magnetic excitation peak is asymmetric, indicating the presence of single and multi-spin-flip excitations. As the hole doping level is increased, the zone boundary magnon energy is suppressed at a much larger rate than that in hole doped cuprates. Based on the analysis of the orbital and charge excitations observed by RIXS, we argue that this difference is related to the orbital character of the doped holes in these two families. Lastly, this work establishes RIXS as a probe of fundamental magnetic interactions in nickelates opening the way towards studies of heterostructures and ultrafast pump-probe experiments.},

  doi          = {10.1103/PhysRevLett.118.156402},

  journal      = {Physical Review Letters},

  number       = 15,

  volume       = 118,

  place        = {United States},

  year         = {Wed Apr 12 00:00:00 EDT 2017},

  month        = {Wed Apr 12 00:00:00 EDT 2017}

}

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Fabbris, G.; Meyers, D.; Okamoto, J.
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The Theory of Atomic Structure and Spectra
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Density matrix averaged atomic natural orbital (ANO) basis sets for correlated molecular wave functions
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Transition metal compounds
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Intense paramagnon excitations in a large family of high-temperature superconductors
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Tacon, M. Le; Ghiringhelli, G.; Chaloupka, J.
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Dispersive spin excitations in highly overdoped cuprates revealed by resonant inelastic x-ray scattering
text, January 2013

Tacon, M. Le; Minola, M.; Peets, D. C.
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Persistence of magnetic excitations in La2-xSrxCuO4 from the undoped insulator to the heavily overdoped non-superconducting metal
text, January 2013

Dean, M. P. M.; Dellea, G.; Springell, R. S.
arXiv
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Persistent spin excitations in doped antiferromagnets revealed by resonant inelastic light scattering
text, January 2013

Jia, C. J.; Nowadnick, E. A.; Wohlfeld, K.
arXiv
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Asymmetry of collective excitations in electron and hole doped cuprate superconductors
text, January 2013

Lee, W. S.; Lee, J. J.; Nowadnick, E. A.
arXiv
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Direct observation of dynamic charge stripes in La2-xSrxNiO4
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Anissimova, S.; Parshall, D.; Gu, G. D.
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Excitonic quasiparticles in a spin-orbit Mott insulator
text, January 2014

Kim, Jungho; Daghofer, M.; Said, A. H.
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Collective nature of spin excitations in superconducting cuprates probed by resonant inelastic x-ray scattering
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Minola, M.; Dellea, G.; Gretarsson, H.
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High-energy magnetic excitations in overdoped La$_{2-x}$Sr$_{x}$CuO$_{4}$ studied by neutron and resonant inelastic X-ray scattering
text, January 2015

Wakimoto, S.; Ishii, K.; Kimura, H.
arXiv
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Orbital engineering in nickelate heterostructures driven by anisotropic oxygen hybridization rather than orbital energy levels
text, January 2016

Fabbris, G.; Meyers, D.; Okamoto, J.
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Works referencing / citing this record:

Ab‐Initio Real‐Time Magnon Dynamics in Ferromagnetic and Ferrimagnetic Systems
journal, January 2020

Singh, Nisha; Elliott, Peter; Dewhurst, J. Kay
physica status solidi (b), Vol. 257, Issue 7
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Ultrafast dynamics of spin and orbital correlations in quantum materials: an energy- and momentum-resolved perspective
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Cao, Y.; Mazzone, D. G.; Meyers, D.
Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, Vol. 377, Issue 2145
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Low-energy orbital excitations in strained ${LaCoO}_{3}$ films
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Wang, Ru-Pan; Geessinck, Jaap; Elnaggar, Hebatalla
Physical Review B, Vol. 100, Issue 16
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Measurement of the Resonant Magneto-Optical Kerr Effect Using a Free Electron Laser
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Yamamoto, Shingo; Matsuda, Iwao
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Site-Selective Probe of Magnetic Excitations in Rare-Earth Nickelates Using Resonant Inelastic X-ray Scattering
text, January 2018

Lu, Y.; Betto, D.; Fürsich, K.
Karlsruhe
DOI: 10.5445/ir/1000084863

Continuum Charge Excitations in High-Valence Transition-Metal Oxides Revealed by Resonant Inelastic X-ray Scattering
text, January 2018

Hariki, Atsushi; Winder, Mathias; Kuneš, Jan
arXiv
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Emergent c-axis magnetic helix in manganite-nickelate superlattices
text, January 2018

Fabbris, G.; Jaouen, N.; Meyers, D.
arXiv
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Ultrafast dynamics of spin and orbital correlations in quantum materials: an energy- and momentum-resolved perspective
text, January 2018

Cao, Y.; Mazzone, D. G.; Meyers, D.
arXiv
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Title: Doping Dependence of Collective Spin and Orbital Excitations in the Spin-1 Quantum Antiferromagnet La 2 - x Sr x NiO 4 Observed by X Rays

Abstract

Citation Formats

Persistence of High-Frequency Spin Fluctuations in Overdoped Superconducting La 2 − x Sr x CuO 4 ( x = 0.22 ) journal, August 2007

Multiplet effects in X-ray spectroscopy journal, January 2005

Spin–orbital separation in the quasi-one-dimensional Mott insulator Sr2CuO3 journal, April 2012

Spin dynamics in stripe-ordered La 5 / 3 Sr 1 / 3 NiO 4 journal, March 2003

Two energy scales in the spin excitations of the high-temperature superconductor La2−xSrxCuO4 journal, February 2007

A combination of quasirelativistic pseudopotential and ligand field calculations for lanthanoid compounds journal, June 1993

Molecular Electronic-Structure Theory book, August 2000

Comparison of x-ray absorption with x-ray photoemission of nickel dihalides and NiO journal, March 1986

Spin dynamics of half-doped La 3 ∕ 2 Sr 1 ∕ 2 Ni O 4 journal, May 2005

Emergence of Coherent Magnetic Excitations in the High Temperature Underdoped La 2 − x Sr x CuO 4 Superconductor at Low Temperatures journal, April 2009

Multiplet structure in the L 2 , 3 x-ray-absorption spectra: A fingerprint for high- and low-spin Ni 2 + compounds journal, April 1988

Collective Nature of Spin Excitations in Superconducting Cuprates Probed by Resonant Inelastic X-Ray Scattering journal, May 2015

Magnetic Excitation Spectra of Sr 2 IrO 4 Probed by Resonant Inelastic X-Ray Scattering: Establishing Links to Cuprate Superconductors journal, April 2012

Theory of Resonant Inelastic X-Ray Scattering by Collective Magnetic Excitations journal, October 2010

Doping dependence of the magnetic excitations in La 2 − x Sr x CuO 4 journal, February 2017

Asymmetry of collective excitations in electron- and hole-doped cuprate superconductors journal, October 2014

Magnetic excitations in stripe-ordered La 1.875 Ba 0.125 CuO 4 studied using resonant inelastic x-ray scattering journal, July 2013

Transition Metal Compounds book, January 2014

Resonant inelastic x-ray scattering studies of elementary excitations journal, June 2011

Ab Initio determination of Cu 3d orbital energies in layered copper oxides journal, August 2011

Excitonic quasiparticles in a spin–orbit Mott insulator journal, July 2014

Spin-Wave Excitations in Two Dimensional Antiferromagnet of Stoichiometric La 2 NiO 4 journal, December 1993

Gaussian basis sets for use in correlated molecular calculations. I. The atoms boron through neon and hydrogen journal, January 1989

Persistence of magnetic excitations in La2−xSrxCuO4 from the undoped insulator to the heavily overdoped non-superconducting metal journal, August 2013

Ab initio calculation of d - d excitations in quasi-one-dimensional Cu d 9 correlated materials journal, December 2011

Systematic computation of crystal-field multiplets for x-ray core spectroscopies journal, March 2012

Energy‐adjusted a b i n i t i o pseudopotentials for the first row transition elements journal, January 1987

High-Energy Magnetic Excitations in the Cuprate Superconductor Bi 2 Sr 2 CaCu 2 O 8 + δ : Towards a Unified Description of Its Electronic and Magnetic Degrees of Freedom journal, April 2013

NiO as a test case for high resolution resonant inelastic soft x-ray scattering journal, August 2005

Oxygen and strontium codoping of La 2 Ni O 4 : Room-temperature phase diagrams journal, August 2004

Spin excitations in a single La2CuO4 layer journal, September 2012

Magnetic Excitations and Phase Separation in the Underdoped La 2 − x Sr x CuO 4 Superconductor Measured by Resonant Inelastic X-Ray Scattering journal, February 2010

Towards 10 meV resolution: The design of an ultrahigh resolution soft X-ray RIXS spectrometer journal, November 2016

Polarization-dependent nickel 2 p x-ray-absorption spectra of La 2 NiO 4 + δ journal, January 1998

Persistent spin excitations in doped antiferromagnets revealed by resonant inelastic light scattering journal, February 2014

Local spin-flip spectral distribution obtained by resonant x-ray Raman scattering journal, June 1998

Simultaneous Ordering of Holes and Spins in La 2 Ni O 4.125 journal, August 1994

Systematically convergent basis sets for transition metals. I. All-electron correlation consistent basis sets for the 3d elements Sc–Zn journal, August 2005

Neutron diffraction study on structural and magnetic properties of La 2 NiO 4 journal, May 1991

Ultrafast energy- and momentum-resolved dynamics of magnetic correlations in the photo-doped Mott insulator Sr2IrO4 journal, May 2016

Optical spectroscopy of the charge-ordering transition in La 1.67 Sr 0.33 NiO 4 journal, November 1996

Raman and fluorescence characteristics of resonant inelastic X-ray scattering from doped superconducting cuprates journal, January 2016

Localized Electronic Excitations in NiO Studied with Resonant Inelastic X-Ray Scattering at the Ni M Threshold: Evidence of Spin Flip journal, October 2005

High-energy magnetic excitations in overdoped La 2 − x Sr x CuO 4 studied by neutron and resonant inelastic x-ray scattering journal, May 2015

Magnetic and ligand field properties of copper at the interfaces of (CaCuO 2 ) n /(SrTiO 3 ) n superlattices journal, June 2012

Energy-adjusted pseudopotentials for the rare earth elements journal, January 1989

O 1 s near-edge x-ray absorption of La 2 − x Sr x NiO 4 + δ : Holes, polarons, and excitons journal, April 1996

SAXES, a high resolution spectrometer for resonant x-ray emission in the 400–1600eV energy range journal, November 2006

Direct observation of dynamic charge stripes in La2–xSrxNiO4 journal, March 2014

The CTM4XAS program for EELS and XAS spectral shape analysis of transition metal L edges journal, October 2010

Insights into the high temperature superconducting cuprates from resonant inelastic X-ray scattering journal, February 2015

Dispersive spin excitations in highly overdoped cuprates revealed by resonant inelastic x-ray scattering journal, July 2013

Intense paramagnon excitations in a large family of high-temperature superconductors journal, July 2011

High-resolution soft X-ray beamline ADRESS at the Swiss Light Source for resonant inelastic X-ray scattering and angle-resolved photoelectron spectroscopies journal, July 2010

Complete Two-Dimensional Antiferromagnetic Spin-Wave Dispersion Relation of La 2 NiO 4 Determined by Chopper Spectrometer Installed at the Pulsed Neutron Source journal, April 1991

Orbital characters of three-dimensional Fermi surfaces in Eu 2 − x Sr x NiO 4 as probed by soft-x-ray angle-resolved photoemission spectroscopy journal, December 2011

Magnetic spectrum of the two-dimensional antiferromagnet La 2 CoO 4 studied by inelastic neutron scattering journal, November 2010

Evidence for Short-Range-Ordered Charge Stripes Far above the Charge-Ordering Transition in La 1.67 Sr 0.33 NiO 4 journal, August 2013

Core Level Spectroscopy of Solids book, January 2008

Melting of Quasi-Two-Dimensional Charge Stripes in La 5 / 3 Sr 1 / 3 NiO 4 journal, September 1997

Density matrix averaged atomic natural orbital (ANO) basis sets for correlated molecular wave functions: IV. Medium size basis sets for the atoms H-Kr journal, January 1995

Variational calculation of small energy differences. The singlet-triplet gap in [Cu2Cl6]2− journal, October 1992

d − d excitations and charge ordering in La 5 / 3 Sr 1 / 3 NiO 4 journal, May 2010

Isotropic O 1s prepeak as evidence for polarons in La2NiO4 + δ journal, March 1995

Mapping spin-wave dispersions in stripe-ordered La 2 − x Sr x Ni O 4 ( x = 0.275 , 0.333) journal, August 2005

Magnetic Correlations in La 2 Ni O 4 + δ journal, July 1988

Quenched Magnon excitations by oxygen sublattice reconstruction in (SrCuO2)n/(SrTiO3)2 superlattices journal, September 2016

Ground-state oxygen holes and the metal–insulator transition in the negative charge-transfer rare-earth nickelates journal, October 2016

Electronic states in La 2 − x Sr x CuO 4 + δ probed by soft-x-ray absorption journal, January 1991

Spin Waves and Electronic Interactions in La 2 CuO 4 journal, June 2001

Observation of Two Nondispersive Magnetic Excitations in NiO by Resonant Inelastic Soft-X-Ray Scattering journal, January 2009

High-Energy Spin Dynamics in L a 1.69 S r 0.31 N i O 4 journal, April 2003

Orbital Engineering in Nickelate Heterostructures Driven by Anisotropic Oxygen Hybridization rather than Orbital Energy Levels journal, September 2016

Structure of the interstitial oxygen defect in La 2 NiO 4 + δ journal, August 1989

The Theory of Atomic Structure and Spectra book, December 1981

Density matrix averaged atomic natural orbital (ANO) basis sets for correlated molecular wave functions journal, January 1995

Transition metal compounds journal, December 1976

Title: Doping Dependence of Collective Spin and Orbital Excitations in the Spin-1 Quantum Antiferromagnet ${La}_{2 - x} {Sr}_{x} {NiO}_{4}$ Observed by X Rays

Persistence of High-Frequency Spin Fluctuations in Overdoped Superconducting ${La}_{2 - x} {Sr}_{x} {CuO}_{4}$ ( $x = 0.22$ )
journal, August 2007

Multiplet effects in X-ray spectroscopy
journal, January 2005

Spin–orbital separation in the quasi-one-dimensional Mott insulator Sr2CuO3
journal, April 2012

Spin dynamics in stripe-ordered ${La}_{5 / 3} {Sr}_{1 / 3} {NiO}_{4}$
journal, March 2003

Two energy scales in the spin excitations of the high-temperature superconductor La2−xSrxCuO4
journal, February 2007

A combination of quasirelativistic pseudopotential and ligand field calculations for lanthanoid compounds
journal, June 1993

Molecular Electronic-Structure Theory
book, August 2000

Comparison of x-ray absorption with x-ray photoemission of nickel dihalides and NiO
journal, March 1986

Spin dynamics of half-doped ${La}_{3 ∕ 2} {Sr}_{1 ∕ 2} Ni O_{4}$
journal, May 2005

Emergence of Coherent Magnetic Excitations in the High Temperature Underdoped ${La}_{2 - x} {Sr}_{x} {CuO}_{4}$ Superconductor at Low Temperatures
journal, April 2009

Multiplet structure in the $L_{2}$ , 3 x-ray-absorption spectra: A fingerprint for high- and low-spin ${Ni}^{2 +}$ compounds
journal, April 1988

Collective Nature of Spin Excitations in Superconducting Cuprates Probed by Resonant Inelastic X-Ray Scattering
journal, May 2015

Magnetic Excitation Spectra of ${Sr}_{2} {IrO}_{4}$ Probed by Resonant Inelastic X-Ray Scattering: Establishing Links to Cuprate Superconductors
journal, April 2012

Theory of Resonant Inelastic X-Ray Scattering by Collective Magnetic Excitations
journal, October 2010

Doping dependence of the magnetic excitations in ${La}_{2 - x} {Sr}_{x} {CuO}_{4}$
journal, February 2017

Asymmetry of collective excitations in electron- and hole-doped cuprate superconductors
journal, October 2014

Magnetic excitations in stripe-ordered La $_{1.875}$ Ba $_{0.125}$ CuO $_{4}$ studied using resonant inelastic x-ray scattering
journal, July 2013

Transition Metal Compounds
book, January 2014

Resonant inelastic x-ray scattering studies of elementary excitations
journal, June 2011

Ab Initio determination of Cu 3d orbital energies in layered copper oxides
journal, August 2011

Excitonic quasiparticles in a spin–orbit Mott insulator
journal, July 2014

Spin-Wave Excitations in Two Dimensional Antiferromagnet of Stoichiometric La ₂ NiO ₄
journal, December 1993

Gaussian basis sets for use in correlated molecular calculations. I. The atoms boron through neon and hydrogen
journal, January 1989

Persistence of magnetic excitations in La2−xSrxCuO4 from the undoped insulator to the heavily overdoped non-superconducting metal
journal, August 2013

Ab initio calculation of $d$ - $d$ excitations in quasi-one-dimensional Cu $d^{9}$ correlated materials
journal, December 2011

Systematic computation of crystal-field multiplets for x-ray core spectroscopies
journal, March 2012

Energy‐adjusted a b i n i t i o pseudopotentials for the first row transition elements
journal, January 1987

High-Energy Magnetic Excitations in the Cuprate Superconductor ${Bi}_{2} {Sr}_{2} {CaCu}_{2} O_{8 + δ}$ : Towards a Unified Description of Its Electronic and Magnetic Degrees of Freedom
journal, April 2013

NiO as a test case for high resolution resonant inelastic soft x-ray scattering
journal, August 2005

Oxygen and strontium codoping of ${La}_{2} Ni O_{4}$ : Room-temperature phase diagrams
journal, August 2004

Spin excitations in a single La2CuO4 layer
journal, September 2012

Magnetic Excitations and Phase Separation in the Underdoped ${La}_{2 - x} {Sr}_{x} {CuO}_{4}$ Superconductor Measured by Resonant Inelastic X-Ray Scattering
journal, February 2010

Towards 10 meV resolution: The design of an ultrahigh resolution soft X-ray RIXS spectrometer
journal, November 2016

Polarization-dependent nickel $2 p$ x-ray-absorption spectra of ${La}_{2} {NiO}_{4 + δ}$
journal, January 1998

Persistent spin excitations in doped antiferromagnets revealed by resonant inelastic light scattering
journal, February 2014

Local spin-flip spectral distribution obtained by resonant x-ray Raman scattering
journal, June 1998

Simultaneous Ordering of Holes and Spins in ${La}_{2}$ Ni $O_{4.125}$
journal, August 1994

Systematically convergent basis sets for transition metals. I. All-electron correlation consistent basis sets for the 3d elements Sc–Zn
journal, August 2005

Neutron diffraction study on structural and magnetic properties of La ₂ NiO ₄
journal, May 1991

Ultrafast energy- and momentum-resolved dynamics of magnetic correlations in the photo-doped Mott insulator Sr2IrO4
journal, May 2016

Optical spectroscopy of the charge-ordering transition in ${La}_{1.67}$ ${Sr}_{0.33}$ ${NiO}_{4}$
journal, November 1996

Raman and fluorescence characteristics of resonant inelastic X-ray scattering from doped superconducting cuprates
journal, January 2016

Localized Electronic Excitations in NiO Studied with Resonant Inelastic X-Ray Scattering at the Ni $M$ Threshold: Evidence of Spin Flip
journal, October 2005

High-energy magnetic excitations in overdoped ${La}_{2 - x} {Sr}_{x} {CuO}_{4}$ studied by neutron and resonant inelastic x-ray scattering
journal, May 2015

Magnetic and ligand field properties of copper at the interfaces of (CaCuO $_{2}$ ) $_{n}$ /(SrTiO $_{3}$ ) $_{n}$ superlattices
journal, June 2012

Energy-adjusted pseudopotentials for the rare earth elements
journal, January 1989

O 1 s near-edge x-ray absorption of ${La}_{2 - x}$ ${Sr}_{x}$ ${NiO}_{4 + δ}$ : Holes, polarons, and excitons
journal, April 1996

SAXES, a high resolution spectrometer for resonant x-ray emission in the 400–1600eV energy range
journal, November 2006

Direct observation of dynamic charge stripes in La2–xSrxNiO4
journal, March 2014

The CTM4XAS program for EELS and XAS spectral shape analysis of transition metal L edges
journal, October 2010

Insights into the high temperature superconducting cuprates from resonant inelastic X-ray scattering
journal, February 2015

Dispersive spin excitations in highly overdoped cuprates revealed by resonant inelastic x-ray scattering
journal, July 2013

Intense paramagnon excitations in a large family of high-temperature superconductors
journal, July 2011

High-resolution soft X-ray beamline ADRESS at the Swiss Light Source for resonant inelastic X-ray scattering and angle-resolved photoelectron spectroscopies
journal, July 2010

Complete Two-Dimensional Antiferromagnetic Spin-Wave Dispersion Relation of La ₂ NiO ₄ Determined by Chopper Spectrometer Installed at the Pulsed Neutron Source
journal, April 1991

Orbital characters of three-dimensional Fermi surfaces in Eu $_{2 - x}$ Sr $_{x}$ NiO $_{4}$ as probed by soft-x-ray angle-resolved photoemission spectroscopy
journal, December 2011

Magnetic spectrum of the two-dimensional antiferromagnet ${La}_{2} {CoO}_{4}$ studied by inelastic neutron scattering
journal, November 2010

Evidence for Short-Range-Ordered Charge Stripes Far above the Charge-Ordering Transition in ${La}_{1.67} {Sr}_{0.33} {NiO}_{4}$
journal, August 2013

Core Level Spectroscopy of Solids
book, January 2008

Melting of Quasi-Two-Dimensional Charge Stripes in ${La}_{5 / 3} {Sr}_{1 / 3} {NiO}_{4}$
journal, September 1997

Density matrix averaged atomic natural orbital (ANO) basis sets for correlated molecular wave functions: IV. Medium size basis sets for the atoms H-Kr
journal, January 1995

Variational calculation of small energy differences. The singlet-triplet gap in [Cu2Cl6]2−
journal, October 1992

$d − d$ excitations and charge ordering in ${La}_{5 / 3} {Sr}_{1 / 3} {NiO}_{4}$
journal, May 2010

Isotropic O 1s prepeak as evidence for polarons in La2NiO4 + δ
journal, March 1995

Mapping spin-wave dispersions in stripe-ordered ${La}_{2 - x} {Sr}_{x} Ni O_{4}$ ( $x = 0.275$ , 0.333)
journal, August 2005

Magnetic Correlations in ${La}_{2} Ni O_{4 + δ}$
journal, July 1988

Quenched Magnon excitations by oxygen sublattice reconstruction in (SrCuO2)n/(SrTiO3)2 superlattices
journal, September 2016

Ground-state oxygen holes and the metal–insulator transition in the negative charge-transfer rare-earth nickelates
journal, October 2016

Electronic states in ${La}_{2 - x}$ ${Sr}_{x}$ ${CuO}_{4 + δ}$ probed by soft-x-ray absorption
journal, January 1991

Spin Waves and Electronic Interactions in ${La}_{2} {CuO}_{4}$
journal, June 2001

Observation of Two Nondispersive Magnetic Excitations in NiO by Resonant Inelastic Soft-X-Ray Scattering
journal, January 2009

High-Energy Spin Dynamics in ${L a}_{1.69} {S r}_{0.31} {N i O}_{4}$
journal, April 2003

Orbital Engineering in Nickelate Heterostructures Driven by Anisotropic Oxygen Hybridization rather than Orbital Energy Levels
journal, September 2016

Structure of the interstitial oxygen defect in ${La}_{2}$ ${NiO}_{4 + δ}$
journal, August 1989

The Theory of Atomic Structure and Spectra
book, December 1981

Density matrix averaged atomic natural orbital (ANO) basis sets for correlated molecular wave functions
journal, January 1995

Transition metal compounds
journal, December 1976

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text, January 2011

Dispersive spin excitations in highly overdoped cuprates revealed by resonant inelastic x-ray scattering
text, January 2013