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Title: Sr 2 Ir 1 - x Rh x O 4 ( x < 0.5 ) : An inhomogeneous j eff = 1 2 Hubbard system

Abstract

In a combined experimental and theoretical study, we investigate the properties of Sr 2 Ir 1 - x Rh x O 4 . From the branching ratios of the L -edge isotropic x-ray absorption spectra, we determine that the spin-orbit coupling is remarkably independent of x for both iridium and rhodium sites. DFT + U calculations show that the doping is close to isoelectronic and introduces impurity bands of predominantly rhodium character close to the lower Hubbard band. Overlap of these two bands leads to metallic behavior. Since the low-energy states for x < 0.5 have predominantly j eff = 1 /2 character, we suggest that the electronic properties of this material can be described by an inhomogeneous Hubbard model, where the on-site energies change due to local variations in the spin-orbit interaction strength combined with additional changes in binding energy.

Authors:
; ; ; ; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1339133
DOE Contract Number:  
AC02-06CH11357
Resource Type:
Journal Article
Journal Name:
Physical Review. B, Condensed Matter and Materials Physics
Additional Journal Information:
Journal Volume: 92; Journal Issue: 8; Journal ID: ISSN 1098-0121
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

Chikara, Shalinee, Haskel, Daniel, Sim, Jae-Hoon, Kim, Heung-Sik, Chen, Cheng-Chien, Fabbris, G., Veiga, L. S. I., Souza-Neto, N. M., Terzic, J., Butrouna, K., Cao, G., Han, Myung Joon, and van Veenendaal, Michel. Sr2Ir1-xRhxO4(x<0.5) : An inhomogeneous jeff=12 Hubbard system. United States: N. p., 2015. Web. doi:10.1103/PhysRevB.92.081114.
Chikara, Shalinee, Haskel, Daniel, Sim, Jae-Hoon, Kim, Heung-Sik, Chen, Cheng-Chien, Fabbris, G., Veiga, L. S. I., Souza-Neto, N. M., Terzic, J., Butrouna, K., Cao, G., Han, Myung Joon, & van Veenendaal, Michel. Sr2Ir1-xRhxO4(x<0.5) : An inhomogeneous jeff=12 Hubbard system. United States. doi:10.1103/PhysRevB.92.081114.
Chikara, Shalinee, Haskel, Daniel, Sim, Jae-Hoon, Kim, Heung-Sik, Chen, Cheng-Chien, Fabbris, G., Veiga, L. S. I., Souza-Neto, N. M., Terzic, J., Butrouna, K., Cao, G., Han, Myung Joon, and van Veenendaal, Michel. Mon . "Sr2Ir1-xRhxO4(x<0.5) : An inhomogeneous jeff=12 Hubbard system". United States. doi:10.1103/PhysRevB.92.081114.
@article{osti_1339133,
title = {Sr2Ir1-xRhxO4(x<0.5) : An inhomogeneous jeff=12 Hubbard system},
author = {Chikara, Shalinee and Haskel, Daniel and Sim, Jae-Hoon and Kim, Heung-Sik and Chen, Cheng-Chien and Fabbris, G. and Veiga, L. S. I. and Souza-Neto, N. M. and Terzic, J. and Butrouna, K. and Cao, G. and Han, Myung Joon and van Veenendaal, Michel},
abstractNote = {In a combined experimental and theoretical study, we investigate the properties of Sr 2 Ir 1 - x Rh x O 4 . From the branching ratios of the L -edge isotropic x-ray absorption spectra, we determine that the spin-orbit coupling is remarkably independent of x for both iridium and rhodium sites. DFT + U calculations show that the doping is close to isoelectronic and introduces impurity bands of predominantly rhodium character close to the lower Hubbard band. Overlap of these two bands leads to metallic behavior. Since the low-energy states for x < 0.5 have predominantly j eff = 1 /2 character, we suggest that the electronic properties of this material can be described by an inhomogeneous Hubbard model, where the on-site energies change due to local variations in the spin-orbit interaction strength combined with additional changes in binding energy.},
doi = {10.1103/PhysRevB.92.081114},
journal = {Physical Review. B, Condensed Matter and Materials Physics},
issn = {1098-0121},
number = 8,
volume = 92,
place = {United States},
year = {2015},
month = {8}
}

Works referenced in this record:

Ordered states in the disordered Hubbard model
journal, March 1998

  • Denteneer, P. J. H.; Ulmke, M.; Scalettar, R. T.
  • Physica A: Statistical Mechanics and its Applications, Vol. 251, Issue 1-2
  • DOI: 10.1016/s0378-4371(97)00602-x

Strong Spin-Orbit Coupling Effects on the Fermi Surface of Sr 2 RuO 4 and Sr 2 RhO 4
journal, July 2008


Dilute magnetism and spin-orbital percolation effects in Sr 2 Ir 1 x Rh x O 4
journal, February 2014


Orbital Magnetism and Spin-Orbit Effects in the Electronic Structure of BaIrO 3
journal, November 2010


Transport Properties and Cationic Substitutions in Sr2IrO4
journal, January 2009


Insight on the electronic state of Sr 2 IrO 4 revealed by cationic substitutions
journal, June 2008


Inhomogeneous Metallic Phase in a Disordered Mott Insulator in Two Dimensions
journal, September 2004


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


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


Insulator-metal transition driven by change of doping and spin-orbit interaction in Sr 2 IrO 4
journal, January 2012


Reduced Effective Spin-Orbital Degeneracy and Spin-Orbital Ordering in Paramagnetic Transition-Metal Oxides: Sr 2 IrO 4 versus Sr 2 RhO 4
journal, December 2011


Local Probe for Spin-Orbit Interaction
journal, May 1988


Pressure Tuning of the Spin-Orbit Coupled Ground State in Sr 2 IrO 4
journal, July 2012


Spin-orbit tuned metal-insulator transitions in single-crystal Sr 2 Ir 1 x Rh x O 4 ( 0 x 1 )
journal, September 2012


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


Optical Conductivity in Mott-Hubbard Systems
journal, July 1995


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


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


Pressure Tuning of the Spin-Orbit Coupled Ground State in Sr 2 IrO 4
journal, July 2012


Insulator-metal transition driven by change of doping and spin-orbit interaction in Sr 2 IrO 4
journal, January 2012


Spin-orbit tuned metal-insulator transitions in single-crystal Sr 2 Ir 1 x Rh x O 4 ( 0 x 1 )
journal, September 2012


Dilute magnetism and spin-orbital percolation effects in Sr 2 Ir 1 x Rh x O 4
journal, February 2014


Orbital Magnetism and Spin-Orbit Effects in the Electronic Structure of BaIrO 3
journal, November 2010


Local Probe for Spin-Orbit Interaction
journal, May 1988


Reduced Effective Spin-Orbital Degeneracy and Spin-Orbital Ordering in Paramagnetic Transition-Metal Oxides: Sr 2 IrO 4 versus Sr 2 RhO 4
journal, December 2011


Strong Spin-Orbit Coupling Effects on the Fermi Surface of Sr 2 RuO 4 and Sr 2 RhO 4
journal, July 2008


Optical Conductivity in Mott-Hubbard Systems
journal, July 1995


Ordered states in the disordered Hubbard model
journal, March 1998

  • Denteneer, P. J. H.; Ulmke, M.; Scalettar, R. T.
  • Physica A: Statistical Mechanics and its Applications, Vol. 251, Issue 1-2
  • DOI: 10.1016/S0378-4371(97)00602-X

Inhomogeneous Metallic Phase in a Disordered Mott Insulator in Two Dimensions
journal, September 2004


    Works referencing / citing this record:

    Magnetic excitations in hole-doped Sr 2 IrO 4 : Comparison with electron-doped cuprates
    journal, September 2019


    Parametrization of LSDA + U for noncollinear magnetic configurations: Multipolar magnetism in UO 2
    journal, August 2019


    Pressure tuning of bond-directional exchange interactions and magnetic frustration in the hyperhoneycomb iridate β Li 2 IrO 3
    journal, October 2017


    Preferential quenching of 5 d antiferromagnetic order in Sr 3 (Ir 1− x Mn x ) 2 O 7
    journal, April 2019

    • Schmehr, Julian L.; Zoghlin, Eli; Porter, Zach
    • Journal of Physics: Condensed Matter, Vol. 31, Issue 24
    • DOI: 10.1088/1361-648x/ab0ef9

    Competition between disorder and Coulomb interaction in a two-dimensional plaquette Hubbard model
    journal, June 2016


    Charge partitioning and anomalous hole doping in Rh-doped Sr 2 IrO 4
    journal, February 2017