Structural, electronic, and magnetic properties of nearly ideal Jeff = 1/2 iridium halides

Reig-i-Plessis, D.; Johnson, T. A.; Lu, K.; Chen, Q.; Ruff, J. C.; Upton, M. H.; Williams, T. J.; Calder, S.; Zhou, H. D.; Clancy, J. P.; Aczel, A. A.; MacDougall, G. J.

doi:10.1103/physrevmaterials.4.124407

Title: Structural, electronic, and magnetic properties of nearly ideal J_eff = 1/2 iridium halides

Abstract

Heavy transition metal magnets with J(eff) = 1/2 electronic ground states have attracted recent interest due to their penchant for hosting new classes of quantum spin liquids and superconductors. Unfortunately, model systems with ideal J(eff) = 1/2 states are scarce due to the importance of noncubic local distortions in most candidate materials. In this work, we identify a family of iridium halide systems [i.e., K2IrCl6, K2IrBr6, (NH4)(2)IrCl6, and Na2IrCl6.6(H2O)] with Ir-4(+) electronic ground states exhibiting extremely small deviations from the ideal J(eff) =1 limit. We also find ordered magnetic ground states for the three anhydrous systems, with single-crystal neutron diffraction on K2IrBr6 revealing type-I antiferromagnetism. This spin configuration is consistent with expectations for significant Kitaev exchange in a face-centered-cubic magnet. This work establishes that incorporating isolated IrX6 octahedra in materials, where X is a halogen ion with a low electronegativity, is an effective design principle for realizing unprecedented proximity to the pure J(eff) = state. At the same time, we highlight undeniable deviations from this ideal state, even in clean materials with ideal IrX6 octahedra as inferred from the global cubic crystal structures.

Authors:

Reig-i-Plessis, D. ^[1];

^[2];

^[3]; Ruff, J. C. ^[4]; Upton, M. H. ^[5];

^[6];

^[3]; Clancy, J. P. ^[7];

^[6];

^[2]

Univ. of Illinois at Urbana-Champaign, IL (United States); Univ. of British Columbia, Vancouver, BC (Canada)
Univ. of Illinois at Urbana-Champaign, IL (United States)
Univ. of Tennessee, Knoxville, TN (United States)
Cornell Univ., Ithaca, NY (United States). Cornell High Energy Synchrotron Source (CHESS)
Argonne National Lab. (ANL), Lemont, IL (United States). Advanced Photon Source (APS)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
McMaster Univ., Hamilton, ON (Canada)

Publication Date:: Thu Dec 17 00:00:00 EST 2020

Research Org.:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Argonne National Lab. (ANL), Argonne, IL (United States)

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

OSTI Identifier:: 1755299

Alternate Identifier(s):: OSTI ID: 1787598

Grant/Contract Number:: AC05-00OR22725; AC02-06CH11357; DMR-1332208; DMR-1829070; DMR-1455264; DMR-2003117

Resource Type:: Accepted Manuscript

Journal Name:: Physical Review Materials

Additional Journal Information:: Journal Volume: 4; Journal Issue: 12; Journal ID: ISSN 2475-9953

Publisher:: American Physical Society (APS)

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE; Magnetic order; magnetic phase transitions; magnetism; spin-orbit coupling; structural properties

Citation Formats


                    Reig-i-Plessis, D., Johnson, T. A., Lu, K., Chen, Q., Ruff, J. C., Upton, M. H., Williams, T. J., Calder, S., Zhou, H. D., Clancy, J. P., Aczel, A. A., and MacDougall, G. J. Structural, electronic, and magnetic properties of nearly ideal Jeff = 1/2 iridium halides.  United States: N. p., 2020. 
Web.  doi:10.1103/physrevmaterials.4.124407.

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                    Reig-i-Plessis, D., Johnson, T. A., Lu, K., Chen, Q., Ruff, J. C., Upton, M. H., Williams, T. J., Calder, S., Zhou, H. D., Clancy, J. P., Aczel, A. A., & MacDougall, G. J. Structural, electronic, and magnetic properties of nearly ideal Jeff = 1/2 iridium halides.  United States.  https://doi.org/10.1103/physrevmaterials.4.124407

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                    Reig-i-Plessis, D., Johnson, T. A., Lu, K., Chen, Q., Ruff, J. C., Upton, M. H., Williams, T. J., Calder, S., Zhou, H. D., Clancy, J. P., Aczel, A. A., and MacDougall, G. J. Thu .  
"Structural, electronic, and magnetic properties of nearly ideal Jeff = 1/2 iridium halides".  United States.  https://doi.org/10.1103/physrevmaterials.4.124407.  https://www.osti.gov/servlets/purl/1755299.

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@article{osti_1755299,

  title        = {Structural, electronic, and magnetic properties of nearly ideal Jeff = 1/2 iridium halides},

  author       = {Reig-i-Plessis, D. and Johnson, T. A. and Lu, K. and Chen, Q. and Ruff, J. C. and Upton, M. H. and Williams, T. J. and Calder, S. and Zhou, H. D. and Clancy, J. P. and Aczel, A. A. and MacDougall, G. J.},

  abstractNote = {Heavy transition metal magnets with J(eff) = 1/2 electronic ground states have attracted recent interest due to their penchant for hosting new classes of quantum spin liquids and superconductors. Unfortunately, model systems with ideal J(eff) = 1/2 states are scarce due to the importance of noncubic local distortions in most candidate materials. In this work, we identify a family of iridium halide systems [i.e., K2IrCl6, K2IrBr6, (NH4)(2)IrCl6, and Na2IrCl6.6(H2O)] with Ir-4(+) electronic ground states exhibiting extremely small deviations from the ideal J(eff) =1 limit. We also find ordered magnetic ground states for the three anhydrous systems, with single-crystal neutron diffraction on K2IrBr6 revealing type-I antiferromagnetism. This spin configuration is consistent with expectations for significant Kitaev exchange in a face-centered-cubic magnet. This work establishes that incorporating isolated IrX6 octahedra in materials, where X is a halogen ion with a low electronegativity, is an effective design principle for realizing unprecedented proximity to the pure J(eff) = state. At the same time, we highlight undeniable deviations from this ideal state, even in clean materials with ideal IrX6 octahedra as inferred from the global cubic crystal structures.},

  doi          = {10.1103/physrevmaterials.4.124407},

  journal      = {Physical Review Materials},

  number       = 12,

  volume       = 4,

  place        = {United States},

  year         = {Thu Dec 17 00:00:00 EST 2020},

  month        = {Thu Dec 17 00:00:00 EST 2020}

}

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Panda, S. K.; Dasgupta, I.
Modern Physics Letters B, Vol. 27, Issue 06
DOI: 10.1142/S0217984913500413

Mott Insulators in the Strong Spin-Orbit Coupling Limit: From Heisenberg to a Quantum Compass and Kitaev Models
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Jackeli, G.; Khaliullin, G.
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DOI: 10.1103/PhysRevLett.102.017205

Carrier localization and electronic phase separation in a doped spin-orbit-driven Mott phase in Sr3(Ir1–xRux)2O7
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Dhital, Chetan; Hogan, Tom; Zhou, Wenwen
Nature Communications, Vol. 5, Issue 1
DOI: 10.1038/ncomms4377

Static and dynamic magnetism of the Ir-based double perovskites ${La}_{2} B {IrO}_{6}$ ( $B = Co$ , Zn) probed by magnetic resonance spectroscopies
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Iakovleva, M.; Fuchs, S.; Alfonsov, A.
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DOI: 10.1103/PhysRevB.98.174401

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Cook, A. M.; Matern, S.; Hickey, C.
Physical Review B, Vol. 92, Issue 2
DOI: 10.1103/PhysRevB.92.020417

Strongly Geometrically Frustrated Magnets
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Ramirez, A. P.
Annual Review of Materials Science, Vol. 24, Issue 1
DOI: 10.1146/annurev.ms.24.080194.002321

Coherent Quasiparticles with a Small Fermi Surface in Lightly Doped ${Sr}_{3} {Ir}_{2} O_{7}$
journal, December 2014

de la Torre, A.; Hunter, E. C.; Subedi, A.
Physical Review Letters, Vol. 113, Issue 25
DOI: 10.1103/PhysRevLett.113.256402

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Title: Structural, electronic, and magnetic properties of nearly ideal Jeff = 1/2 iridium halides

Abstract

Citation Formats

Spin-orbit physics of j = 1 2 Mott insulators on the triangular lattice journal, April 2015

Crystal-Field Splitting and Correlation Effect on the Electronic Structure of A 2 IrO 3 journal, February 2013

Tricritical phenomenon and H − T phase diagram in a single crystal of the double-perovskite iridate La 2 ZnIrO 6 journal, August 2018

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Spin-orbit coupling in iridium-based 5 d compounds probed by x-ray absorption spectroscopy journal, November 2012

Field-induced phase transition in a type III FCC antiferromagnet: K2IrCl6 journal, May 2001

Evolution of magnetism in the single-crystal honeycomb iridates ( Na 1 − x Li x ) 2 Ir O 3 journal, December 2013

Recent advances in magnetic structure determination by neutron powder diffraction journal, October 1993

X-ray diffraction study of [MI(NH3)5Cl] [MIIBr6] (MI = Rh, Ir; MII = Re, Ir) polycrystals journal, October 2010

Models and materials for generalized Kitaev magnetism journal, November 2017

Structural properties and lattice dynamics of 5d transition metal antifluorite crystals journal, January 1980

Coupled Spin Ordering in the Ln 2 LiRuO 6 Double Perovskites journal, January 2009

Linear relation between x-ray absorption branching ratio and valence-band spin-orbit expectation value journal, August 1988

Pressure-driven collapse of the relativistic electronic ground state in a honeycomb iridate journal, August 2018

Neutron diffraction study of magnetic ordering in K2IrCl6, K2ReBr6 and K2ReCl6 journal, June 1968

Local Probe for Spin-Orbit Interaction journal, May 1988

Specific Heats of Ammonium, Potassium, and Sodium Chloroiridates journal, May 1959

Scattering Continuum and Possible Fractionalized Excitations in α − RuCl 3 journal, April 2015

The Structure and Magnetic Properties of New Iridium (IV) Perovskites Sr2LnIrO6 (Ln=Ce, Tb) journal, June 1999

α − RuCl 3 : A spin-orbit assisted Mott insulator on a honeycomb lattice journal, July 2014

J eff = 1 / 2 Mott-Insulating State in Rh and Ir Fluorides journal, March 2015

Specific heat measurements at low temperatures in K2MCl6 antifluorite crystals journal, September 1979

Density-Matrix Renormalization Group Study of Kitaev–Heisenberg Model on a Triangular Lattice journal, November 2016

Putative spin liquid in the triangle-based iridate Ba 3 IrTi 2 O 9 journal, July 2017

Crystal structures and magnetic properties of La 2 Zn x Mg 1 –x IrO 6 journal, January 1996

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

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

Three-dimensional quantum spin liquids in models of harmonic-honeycomb iridates and phase diagram in an infinite- D approximation journal, November 2014

A neutron powder investigation of the structural changes in K 2 SnCl 6 journal, May 1978

Monte Carlo Study of an Unconventional Superconducting Phase in Iridium Oxide J eff = 1 / 2 Mott Insulators Induced by Carrier Doping journal, January 2013

A2B′B″O6 perovskites: A review journal, May 2015

Possible proximity of the Mott insulating iridate Na 2 IrO 3 to a topological phase: Phase diagram of the Heisenberg-Kitaev model in a magnetic field journal, June 2011

Electronic properties of Ba2LnIrO6 (Ln = La, Ce, Pr, Eu, Ho, Er, Yb, Lu) perovskites journal, January 1995

Zigzag Magnetic Order in the Iridium Oxide Na 2 IrO 3 journal, February 2013

Proximate Kitaev quantum spin liquid behaviour in a honeycomb magnet journal, April 2016

X-ray scattering study of pyrochlore iridates: Crystal structure, electronic, and magnetic excitations journal, July 2016

Realization of the orbital-selective Mott state at the molecular level in Ba 3 LaRu 2 O 9 journal, June 2020

Anyons in an exactly solved model and beyond journal, January 2006

Monoclinic crystal structure of α − RuCl 3 and the zigzag antiferromagnetic ground state journal, December 2015

J eff = 1 2 Mott spin-orbit insulating state close to the cubic limit in Ca 4 IrO 6 journal, February 2014

Covalency Effects in the Magnetic Form Factor of Ir in K 2 Ir Cl 6 journal, July 1976

Resonant X-Ray Scattering and the j eff = 1 / 2 Electronic Ground State in Iridate Perovskites journal, January 2014

Magnetic order in α − RuCl 3 : A honeycomb-lattice quantum magnet with strong spin-orbit coupling journal, April 2015

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

Design and Crystal Growth of Magnetic Double Perovskite Iridates: Ln 2 MIrO 6 ( Ln = La, Pr, Nd, Sm-Gd; M = Mg, Ni) journal, April 2016

High-pressure insulator-to-metal transition in Sr 3 Ir 2 O 7 studied by x-ray absorption spectroscopy journal, January 2018

Cubic symmetry and magnetic frustration on the fcc spin lattice in K 2 IrCl 6 journal, April 2019

Neutron scattering in the proximate quantum spin liquid α-RuCl 3 journal, June 2017

Spin-liquid behavior in J eff = 1 2 triangular lattice compound Ba 3 IrTi 2 O 9 journal, October 2012

A suite-level review of the neutron powder diffraction instruments at Oak Ridge National Laboratory journal, September 2018

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Relevance of the Heisenberg-Kitaev Model for the Honeycomb Lattice Iridates A 2 IrO 3 journal, March 2012

On the general linear (Bogoliubov-) transformation for bosons journal, September 1975

Dispersive magnetic and electronic excitations in iridate perovskites probed by oxygen K -edge resonant inelastic x-ray scattering journal, January 2018

Pressure dependence of the structure and electronic properties of Sr 3 Ir 2 O 7 journal, May 2016

Influence of d-electron configuration on phase transitions in A2MX6 (Hexahalometallates IV) journal, March 1977

First-Order Melting of a Weak Spin-Orbit Mott Insulator into a Correlated Metal journal, June 2015

The magnetic structure of K 2 IrCl 6 journal, August 1967

Highly anisotropic exchange interactions of j eff = 1 2 iridium moments on the fcc lattice in La 2 B IrO 6 ( B = Mg , Zn ) journal, June 2016

Spin-lattice coupling mediated multiferroicity in ( ND 4 ) 2 FeCl 5 · D 2 O journal, December 2016

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Magnetic and neutron diffraction study on iridium(IV) perovskites Sr 2 LnIrO 6 (Ln = Ce, Tb) journal, March 2000

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Tuning the J eff = 1 2 insulating state via electron doping and pressure in the double-layered iridate Sr 3 Ir 2 O 7 journal, June 2013

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

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Pressure-Induced Confined Metal from the Mott Insulator Sr 3 Ir 2 O 7 journal, May 2016

Weak orbital ordering of Ir t 2 g states in the double perovskite Sr 2 CeIrO 6 journal, June 2016

Phase transition at 434 K, independent strain coupling in second transition at 400 K, and thermal expansivity in ferroelastic K 2 TeBr 6 journal, August 1984

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Mott Insulators in the Strong Spin-Orbit Coupling Limit: From Heisenberg to a Quantum Compass and Kitaev Models journal, January 2009

Carrier localization and electronic phase separation in a doped spin-orbit-driven Mott phase in Sr3(Ir1–xRux)2O7 journal, February 2014

Title: Structural, electronic, and magnetic properties of nearly ideal J_eff = 1/2 iridium halides

Spin-orbit physics of $j = \frac{1}{2}$ Mott insulators on the triangular lattice
journal, April 2015

Crystal-Field Splitting and Correlation Effect on the Electronic Structure of $A_{2} {IrO}_{3}$
journal, February 2013

Tricritical phenomenon and $H − T$ phase diagram in a single crystal of the double-perovskite iridate $La_{2} ZnIrO_{6}$
journal, August 2018

Global phase diagram, possible chiral spin liquid, and topological superconductivity in the triangular Kitaev–Heisenberg model
journal, April 2015

Na ₂ Ir ^IV Cl ₆ : Spin–Orbital-Induced Semiconductor Showing Hydration-Dependent Structural and Magnetic Variations
journal, October 2018

Spin-orbit coupling in iridium-based 5 $d$ compounds probed by x-ray absorption spectroscopy
journal, November 2012

Field-induced phase transition in a type III FCC antiferromagnet: K2IrCl6
journal, May 2001

Evolution of magnetism in the single-crystal honeycomb iridates $({Na}_{1 - x}$ Li $_{x})_{2} Ir O_{3}$
journal, December 2013

Recent advances in magnetic structure determination by neutron powder diffraction
journal, October 1993

X-ray diffraction study of [MI(NH3)5Cl] [MIIBr6] (MI = Rh, Ir; MII = Re, Ir) polycrystals
journal, October 2010

Models and materials for generalized Kitaev magnetism
journal, November 2017

Structural properties and lattice dynamics of 5d transition metal antifluorite crystals
journal, January 1980

Coupled Spin Ordering in the Ln ₂ LiRuO ₆ Double Perovskites
journal, January 2009

Linear relation between x-ray absorption branching ratio and valence-band spin-orbit expectation value
journal, August 1988

Pressure-driven collapse of the relativistic electronic ground state in a honeycomb iridate
journal, August 2018

Neutron diffraction study of magnetic ordering in K2IrCl6, K2ReBr6 and K2ReCl6
journal, June 1968

Local Probe for Spin-Orbit Interaction
journal, May 1988

Specific Heats of Ammonium, Potassium, and Sodium Chloroiridates
journal, May 1959

Scattering Continuum and Possible Fractionalized Excitations in $α − {RuCl}_{3}$
journal, April 2015

The Structure and Magnetic Properties of New Iridium (IV) Perovskites Sr2LnIrO6 (Ln=Ce, Tb)
journal, June 1999

$α - {RuCl}_{3}$ : A spin-orbit assisted Mott insulator on a honeycomb lattice
journal, July 2014

$J_{eff} = 1 / 2$ Mott-Insulating State in Rh and Ir Fluorides
journal, March 2015

Specific heat measurements at low temperatures in K2MCl6 antifluorite crystals
journal, September 1979

Density-Matrix Renormalization Group Study of Kitaev–Heisenberg Model on a Triangular Lattice
journal, November 2016

Putative spin liquid in the triangle-based iridate ${Ba}_{3} {IrTi}_{2} O_{9}$
journal, July 2017

Crystal structures and magnetic properties of La ₂ Zn _x Mg _{1 –x} IrO ₆
journal, January 1996

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

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

Three-dimensional quantum spin liquids in models of harmonic-honeycomb iridates and phase diagram in an infinite- $D$ approximation
journal, November 2014

A neutron powder investigation of the structural changes in K ₂ SnCl ₆
journal, May 1978

Monte Carlo Study of an Unconventional Superconducting Phase in Iridium Oxide $J_{eff} = 1 / 2$ Mott Insulators Induced by Carrier Doping
journal, January 2013

A2B′B″O6 perovskites: A review
journal, May 2015

Possible proximity of the Mott insulating iridate Na $_{2}$ IrO $_{3}$ to a topological phase: Phase diagram of the Heisenberg-Kitaev model in a magnetic field
journal, June 2011

Electronic properties of Ba2LnIrO6 (Ln = La, Ce, Pr, Eu, Ho, Er, Yb, Lu) perovskites
journal, January 1995

Zigzag Magnetic Order in the Iridium Oxide ${Na}_{2} {IrO}_{3}$
journal, February 2013

Proximate Kitaev quantum spin liquid behaviour in a honeycomb magnet
journal, April 2016

X-ray scattering study of pyrochlore iridates: Crystal structure, electronic, and magnetic excitations
journal, July 2016

Realization of the orbital-selective Mott state at the molecular level in ${Ba}_{3} {LaRu}_{2} O_{9}$
journal, June 2020

Anyons in an exactly solved model and beyond
journal, January 2006

Monoclinic crystal structure of $α - {RuCl}_{3}$ and the zigzag antiferromagnetic ground state
journal, December 2015

$J_{eff} = \frac{1}{2}$ Mott spin-orbit insulating state close to the cubic limit in ${Ca}_{4}$ ${IrO}_{6}$
journal, February 2014

Covalency Effects in the Magnetic Form Factor of Ir in $K_{2}$ Ir ${Cl}_{6}$
journal, July 1976

Resonant X-Ray Scattering and the $j_{eff} = 1 / 2$ Electronic Ground State in Iridate Perovskites
journal, January 2014

Magnetic order in $α - {RuCl}_{3}$ : A honeycomb-lattice quantum magnet with strong spin-orbit coupling
journal, April 2015

Novel $J_{eff} = 1 / 2$ Mott State Induced by Relativistic Spin-Orbit Coupling in ${Sr}_{2} {IrO}_{4}$
journal, August 2008

Design and Crystal Growth of Magnetic Double Perovskite Iridates: Ln ₂ MIrO ₆ ( Ln = La, Pr, Nd, Sm-Gd; M = Mg, Ni)
journal, April 2016

High-pressure insulator-to-metal transition in ${Sr}_{3} {Ir}_{2} O_{7}$ studied by x-ray absorption spectroscopy
journal, January 2018

Cubic symmetry and magnetic frustration on the fcc spin lattice in $K_{2} {IrCl}_{6}$
journal, April 2019

Neutron scattering in the proximate quantum spin liquid α-RuCl ₃
journal, June 2017

Spin-liquid behavior in $J_{eff} = \frac{1}{2}$ triangular lattice compound Ba $_{3}$ IrTi $_{2}$ O $_{9}$
journal, October 2012

A suite-level review of the neutron powder diffraction instruments at Oak Ridge National Laboratory
journal, September 2018

Muon spin rotation and relaxation in magnetic materials
journal, October 1997

Possibility to realize spin-orbit-induced correlated physics in iridium fluorides
journal, June 2017

Revisiting the Kitaev material candidacy of ${Ir}^{4 +}$ double perovskite iridates
journal, April 2019

Generic Spin Model for the Honeycomb Iridates beyond the Kitaev Limit
journal, February 2014

Magnetism and electronic structure of La $_{2}$ ZnIrO $_{6}$ and La $_{2}$ MgIrO $_{6}$ : Candidate $J_{eff} = \frac{1}{2}$ Mott insulators
journal, April 2013

Relevance of the Heisenberg-Kitaev Model for the Honeycomb Lattice Iridates $A_{2} {IrO}_{3}$
journal, March 2012

On the general linear (Bogoliubov-) transformation for bosons
journal, September 1975

Dispersive magnetic and electronic excitations in iridate perovskites probed by oxygen $K$ -edge resonant inelastic x-ray scattering
journal, January 2018

Pressure dependence of the structure and electronic properties of ${Sr}_{3} {Ir}_{2} O_{7}$
journal, May 2016

Influence of d-electron configuration on phase transitions in A2MX6 (Hexahalometallates IV)
journal, March 1977

First-Order Melting of a Weak Spin-Orbit Mott Insulator into a Correlated Metal
journal, June 2015

The magnetic structure of K ₂ IrCl ₆
journal, August 1967

Highly anisotropic exchange interactions of $j_{eff} = \frac{1}{2}$ iridium moments on the fcc lattice in ${La}_{2} B {IrO}_{6} (B = Mg, Zn)$
journal, June 2016

Spin-lattice coupling mediated multiferroicity in ${({ND}_{4})}_{2} {FeCl}_{5} \cdot D_{2} O$
journal, December 2016

Crystal structures and magnetic properties of ordered perovskites Ba2LnIrO6 (Ln = lanthanide)
journal, January 2000

Magnetic and neutron diffraction study on iridium(IV) perovskites Sr ₂ LnIrO ₆ (Ln = Ce, Tb)
journal, March 2000

Magnetic orders proximal to the Kitaev limit in frustrated triangular systems: Application to ${Ba}_{3} {IrTi}_{2} O_{9}$
journal, October 2015

Tuning the $J_{eff} = \frac{1}{2}$ insulating state via electron doping and pressure in the double-layered iridate Sr $_{3}$ Ir $_{2}$ O $_{7}$
journal, June 2013

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

Frustrated spin- $\frac{1}{2}$ molecular magnetism in the mixed-valence antiferromagnets ${Ba}_{3} M {Ru}_{2} O_{9} (M = In$ , Y, Lu)
journal, May 2017

Pressure-Induced Confined Metal from the Mott Insulator ${Sr}_{3} {Ir}_{2} O_{7}$
journal, May 2016

Weak orbital ordering of Ir $t_{2 g}$ states in the double perovskite ${Sr}_{2} {CeIrO}_{6}$
journal, June 2016

Phase transition at 434 K, independent strain coupling in second transition at 400 K, and thermal expansivity in ferroelastic K ₂ TeBr ₆
journal, August 1984

ELECTRONIC STRUCTURE AND MAGNETISM IN Ir -BASED DOUBLE-PEROVSKITE Sr ₂ CeIrO ₆
journal, February 2013

Mott Insulators in the Strong Spin-Orbit Coupling Limit: From Heisenberg to a Quantum Compass and Kitaev Models
journal, January 2009

Carrier localization and electronic phase separation in a doped spin-orbit-driven Mott phase in Sr3(Ir1–xRux)2O7
journal, February 2014

Static and dynamic magnetism of the Ir-based double perovskites ${La}_{2} B {IrO}_{6}$ ( $B = Co$ , Zn) probed by magnetic resonance spectroscopies
journal, November 2018

Spin-orbit coupled $j_{eff} = 1 / 2$ iridium moments on the geometrically frustrated fcc lattice
journal, July 2015