Sr2Ir1–xRhxO4(x<0.5) : An inhomogeneous jeff=12 Hubbard system

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

doi:10.1103/PhysRevB.92.081114

Title: ${Sr}_{2} {Ir}_{1 - x} {Rh}_{x} O_{4} (x < 0.5)$ : An inhomogeneous $j_{eff} = \frac{1}{2}$ Hubbard system

Journal Article · Sat Aug 15 00:00:00 EDT 2015 · Physical Review. B, Condensed Matter and Materials Physics

DOI:https://doi.org/10.1103/PhysRevB.92.081114· OSTI ID:1393967

Chikara, Shalinee ^[1]; Haskel, Daniel ^[1]; Sim, Jae -Hoon ^[2]; Kim, Heung -Sik ^[2]; Chen, Cheng -Chien ^[1]; Fabbris, G. ^[3]; Veiga, L. S. I. ^[4]; Souza-Neto, N. M. ^[5]; Terzic, J. ^[6]; Butrouna, K. ^[6]; Cao, G. ^[6]; Han, Myung Joon ^[2]; van Veenendaal, Michel ^[7]

Argonne National Lab. (ANL), Argonne, IL (United States)
Korea Advanced Institute of Science and Technology, Daejeon (Korea)
Argonne National Lab. (ANL), Argonne, IL (United States); Washington Univ., St. Louis, MO (United States)
Argonne National Lab. (ANL), Argonne, IL (United States); Lab. Nacional de Luz Sincrotron (LNLS), Sao Paulo (Brazil); Univ. Estadual de Campinas, Sao Paulo (Brazil)
Lab. Nacionnal de Luz Sincrotron (LNLS), Sao Paulo (Brazil)
Univ. of Kentucky, Lexington, KY (United States)
Argonne National Lab. (ANL), Argonne, IL (United States); Northern Illinois Univ., DeKalb, IL (United States)

In a combined experimental and theoretical study, we investigate the properties of Sr₂Ir_1-xRh_xO₄. Here, 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.

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Research Organization:: Argonne National Laboratory (ANL), Argonne, IL (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22), Scientific User Facilities Division; Materials Sciences and Engineering Division; National Research Foundation of Korea (NRF); USDOE

Grant/Contract Number:: AC02-06CH11357; FG02-03ER46097; AC02-05CH11231

OSTI ID:: 1393967

Alternate ID(s):: OSTI ID: 1212491

Journal Information:: Physical Review. B, Condensed Matter and Materials Physics, Vol. 92, Issue 8; ISSN 1098-0121

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 24 works

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References (20)

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Cited By (4)

Preferential quenching of 5 d antiferromagnetic order in Sr ₃ (Ir _{1− x} Mn _x ) ₂ O ₇ Schmehr, Julian L.; Zoghlin, Eli; Porter, Zach Journal of Physics: Condensed Matter, Vol. 31, Issue 24 https://doi.org/10.1088/1361-648x/ab0ef9	journal	April 2019
Competition between disorder and Coulomb interaction in a two-dimensional plaquette Hubbard model Lee, Hunpyo; Jeschke, Harald O.; Valentí, Roser Physical Review B, Vol. 93, Issue 22 https://doi.org/10.1103/physrevb.93.224203	journal	June 2016
Charge partitioning and anomalous hole doping in Rh-doped ${Sr}_{2} {IrO}_{4}$ Chikara, S.; Fabbris, G.; Terzic, J. Physical Review B, Vol. 95, Issue 6 https://doi.org/10.1103/physrevb.95.060407	journal	February 2017
Competition between disorder and Coulomb interaction in a two-dimensional plaquette Hubbard model Lee, Hunpyo; Jeschke, Harald O.; Valenti, Roser arXiv https://doi.org/10.48550/arxiv.1605.08514	text	January 2016

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