: An inhomogeneous Hubbard system
- 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 Sr2Ir1-xRhxO4. 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 jeff = 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.
- 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
Web of Science
Preferential quenching of 5 d antiferromagnetic order in Sr 3 (Ir 1− x Mn x ) 2 O 7
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journal | April 2019 |
Competition between disorder and Coulomb interaction in a two-dimensional plaquette Hubbard model
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journal | June 2016 |
Charge partitioning and anomalous hole doping in Rh-doped
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journal | February 2017 |
Competition between disorder and Coulomb interaction in a two-dimensional plaquette Hubbard model | text | January 2016 |
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