skip to main content
DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Anisotropic softening of magnetic excitations in lightly electron-doped Sr2IrO4

Abstract

The magnetic excitations in electron doped (Sr1-xLax)2IrO4 with x = 0:03 were measured using resonant inelastic X-ray scattering at the Ir L3-edge. Although much broadened, well defined dispersive magnetic excitations were observed. Comparing with the magnetic dispersion from the undoped compound, the evolution of the magnetic excitations upon doping is highly anisotropic. Along the anti-nodal direction, the dispersion is almost intact. On the other hand, the magnetic excitations along the nodal direction show significant softening. These results establish the presence of strong magnetic correlations in electron doped (Sr1-xLax)2IrO4 with close analogies to the hole doped cuprates, further motivating the search for high temperature superconductivity in this system.

Authors:
 [1];  [2];  [3];  [4];  [5];  [4];  [2];  [3];  [2];  [6];  [4];  [2]
  1. Chinese Academy of Sciences (CAS), Beijing (China); Collaborative Innovation Center of Quantum Matter, Beijing (China); Brookhaven National Lab. (BNL), Upton, NY (United States)
  2. Brookhaven National Lab. (BNL), Upton, NY (United States)
  3. Chinese Academy of Sciences (CAS), Beijing (China)
  4. Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
  5. Univ. of Kentucky, Lexington, KY (United States)
  6. Chinese Academy of Sciences (CAS), Beijing (China); Collaborative Innovation Center of Quantum Matter, Beijing (China)
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States); Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); National Natural Science Foundation of China (NNSFC); National Science Foundation (NSF)
OSTI Identifier:
1303017
Alternate Identifier(s):
OSTI ID: 1256763; OSTI ID: 1390905
Report Number(s):
BNL-112501-2016-JA
Journal ID: ISSN 2469-9950; R&D Project: PO011; KC0201060
Grant/Contract Number:  
SC00112704; AC02-98CH10886; AC02-06CH11357
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 93; Journal Issue: 24; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

Liu, X., Dean, M. P. M., Meng, Z. Y., Upton, M. H., Qi, T., Gog, T., Cao, Y., Lin, J. Q., Meyers, D., Ding, H., Cao, G., and Hill, J. P. Anisotropic softening of magnetic excitations in lightly electron-doped Sr2IrO4. United States: N. p., 2016. Web. doi:10.1103/PhysRevB.93.241102.
Liu, X., Dean, M. P. M., Meng, Z. Y., Upton, M. H., Qi, T., Gog, T., Cao, Y., Lin, J. Q., Meyers, D., Ding, H., Cao, G., & Hill, J. P. Anisotropic softening of magnetic excitations in lightly electron-doped Sr2IrO4. United States. doi:10.1103/PhysRevB.93.241102.
Liu, X., Dean, M. P. M., Meng, Z. Y., Upton, M. H., Qi, T., Gog, T., Cao, Y., Lin, J. Q., Meyers, D., Ding, H., Cao, G., and Hill, J. P. Fri . "Anisotropic softening of magnetic excitations in lightly electron-doped Sr2IrO4". United States. doi:10.1103/PhysRevB.93.241102. https://www.osti.gov/servlets/purl/1303017.
@article{osti_1303017,
title = {Anisotropic softening of magnetic excitations in lightly electron-doped Sr2IrO4},
author = {Liu, X. and Dean, M. P. M. and Meng, Z. Y. and Upton, M. H. and Qi, T. and Gog, T. and Cao, Y. and Lin, J. Q. and Meyers, D. and Ding, H. and Cao, G. and Hill, J. P.},
abstractNote = {The magnetic excitations in electron doped (Sr1-xLax)2IrO4 with x = 0:03 were measured using resonant inelastic X-ray scattering at the Ir L3-edge. Although much broadened, well defined dispersive magnetic excitations were observed. Comparing with the magnetic dispersion from the undoped compound, the evolution of the magnetic excitations upon doping is highly anisotropic. Along the anti-nodal direction, the dispersion is almost intact. On the other hand, the magnetic excitations along the nodal direction show significant softening. These results establish the presence of strong magnetic correlations in electron doped (Sr1-xLax)2IrO4 with close analogies to the hole doped cuprates, further motivating the search for high temperature superconductivity in this system.},
doi = {10.1103/PhysRevB.93.241102},
journal = {Physical Review B},
number = 24,
volume = 93,
place = {United States},
year = {2016},
month = {6}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Citation Metrics:
Cited by: 10 works
Citation information provided by
Web of Science

Save / Share:

Works referenced in this record:

Theory of resonant inelastic x-ray scattering in iridium oxide compounds: Probing spin-orbit-entangled ground states and excitations
journal, July 2011

  • Ament, Luuk J. P.; Khaliullin, Giniyat; van den Brink, Jeroen
  • Physical Review B, Vol. 84, Issue 2
  • DOI: 10.1103/PhysRevB.84.020403

Odd-Parity Triplet Superconducting Phase in Multiorbital Materials with a Strong Spin-Orbit Coupling: Application to Doped Sr 2 IrO 4
journal, October 2014


Magnetic response in the underdoped cuprates
journal, September 2012


Structural and magnetic studies of Sr 2 IrO 4
journal, April 1994


Novel J eff = 1 / 2 Mott State Induced by Relativistic Spin-Orbit Coupling in Sr 2 IrO 4
journal, August 2008


Lattice-driven magnetoresistivity and metal-insulator transition in single-layered iridates
journal, September 2011


From quantum matter to high-temperature superconductivity in copper oxides
journal, February 2015

  • Keimer, B.; Kivelson, S. A.; Norman, M. R.
  • Nature, Vol. 518, Issue 7538
  • DOI: 10.1038/nature14165

Fermi surface evolution and collapse of the Mott pseudogap in Nd 2 x Ce x CuO 4 ± δ
journal, October 2002


Hallmarks of the Mott-metal crossover in the hole-doped pseudospin-1/2 Mott insulator Sr2IrO4
journal, April 2016

  • Cao, Yue; Wang, Qiang; Waugh, Justin A.
  • Nature Communications, Vol. 7, Issue 1
  • DOI: 10.1038/ncomms11367

Anomalous superconductivity and its competition with antiferromagnetism in doped Mott insulators
journal, May 2008


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


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

  • Kim, Jungho; Daghofer, M.; Said, A. H.
  • Nature Communications, Vol. 5, Issue 1
  • DOI: 10.1038/ncomms5453

Anisotropic exchange interactions of spin-orbit-integrated states in Sr 2 IrO 4
journal, August 2009


Anisotropic softening of magnetic excitations along the nodal direction in superconducting cuprates
journal, December 2014

  • Guarise, M.; Piazza, B. Dalla; Berger, H.
  • Nature Communications, Vol. 5, Issue 1
  • DOI: 10.1038/ncomms6760

Collective spin excitations in the singlet-correlated band model: a comparison with resonant inelastic x-ray scattering
journal, July 2013


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

  • Le Tacon, M.; Ghiringhelli, G.; Chaloupka, J.
  • Nature Physics, Vol. 7, Issue 9
  • DOI: 10.1038/nphys2041

Mott physics and the optical conductivity of electron-doped cuprates
journal, December 2005


Self-energy effects in electronic Raman spectra of doped cuprates due to magnetic fluctuations
journal, June 2013


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

  • Dean, M. P. M.; Dellea, G.; Springell, R. S.
  • Nature Materials, Vol. 12, Issue 11
  • DOI: 10.1038/nmat3723

Itinerant effects and enhanced magnetic interactions in Bi-based multilayer cuprates
journal, December 2014


Collapse of the Mott Gap and Emergence of a Nodal Liquid in Lightly Doped Sr 2 IrO 4
journal, October 2015


Phase-Sensitive Observation of a Spin-Orbital Mott State in Sr2IrO4
journal, March 2009


Electron-Doped Sr 2 IrO 4 : An Analogue of Hole-Doped Cuprate Superconductors Demonstrated by Scanning Tunneling Microscopy
journal, November 2015


Fermi arcs in a doped pseudospin-1/2 Heisenberg antiferromagnet
journal, June 2014


Twisted Hubbard Model for Sr 2 IrO 4 : Magnetism and Possible High Temperature Superconductivity
journal, March 2011


Doping a Mott insulator: Physics of high-temperature superconductivity
journal, January 2006

  • Lee, Patrick A.; Nagaosa, Naoto; Wen, Xiao-Gang
  • Reviews of Modern Physics, Vol. 78, Issue 1
  • DOI: 10.1103/RevModPhys.78.17

Observation of a d-wave gap in electron-doped Sr2IrO4
journal, October 2015

  • Kim, Y. K.; Sung, N. H.; Denlinger, J. D.
  • Nature Physics, Vol. 12, Issue 1
  • DOI: 10.1038/nphys3503

Influence of electron doping on the ground state of ( Sr 1 x La x ) 2 IrO 4
journal, August 2015


A common thread: The pairing interaction for unconventional superconductors
journal, October 2012


Angle-resolved photoemission studies of the cuprate superconductors
journal, April 2003

  • Damascelli, Andrea; Hussain, Zahid; Shen, Zhi-Xun
  • Reviews of Modern Physics, Vol. 75, Issue 2
  • DOI: 10.1103/RevModPhys.75.473