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

Year: 2008
Type: article
Abstract: We investigated the electronic structure of 5d transition-metal oxide Sr2IrO4 using angle-resolved photoemission, optical conductivity, x-ray absorption measurements, and first-principles band calculations. The system was found to be well described by novel effective total angular momentum Jeff states, in which the relativistic spin-orbit coupling is fully taken into account under a large crystal field. Despite delocalized Ir 5d states, the Jeff states form such narrow bands that even a small correlation energy leads to the Jeff=1/2 Mott ground state with unique electronic and magnetic behaviors, suggesting a new class of Jeff quantum spin driven correlated-electron phenomena.
DOI: 10.1103/physrevlett.101.076402
Authors: B. J. Kim, Hosub Jin, S. J. Moon, J.-Y. Kim, B.-G. Park, C. S. Leem, Jaejun Yu, T. W. Noh, C. Kim, S.-J. Oh, J.-H. Park, V. Durairaj, G. Cao, E. Rotenberg
Institutions: Seoul National University, Pohang University of Science and Technology, Pohang Accelerator Laboratory, Yonsei University, University of Kentucky, Lawrence Berkeley National Laboratory, Advanced Light Source
Language: English
Open Access status: green
OpenAlex ID: W1980575744
FWCI: 15.23
Cites: 28
Cited by: 1,570
Related to: 9