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Novel J(eff)=1/2 Mott state induced by relativistic spin-orbit coupling in Sr2IrO4 SCIE SCOPUS

Title
Novel J(eff)=1/2 Mott state induced by relativistic spin-orbit coupling in Sr2IrO4
Authors
Kim, BJJin, HMoon, SJKim, JYPark, BGLeem, CSYu, JNoh, TWKim, COh, SJPark, JHDurairaj, VCao, GRotenberg, E
Date Issued
2008-08-15
Publisher
AMER PHYSICAL SOC
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 J(eff) states, in which the relativistic spin-orbit coupling is fully taken into account under a large crystal field. Despite delocalized Ir 5d states, the J(eff) states form such narrow bands that even a small correlation energy leads to the J(eff) = 1/2 Mott ground state with unique electronic and magnetic behaviors, suggesting a new class of J(eff) quantum spin driven correlated-electron phenomena.
URI
https://oasis.postech.ac.kr/handle/2014.oak/12456
DOI
10.1103/PhysRevLett.101.076402
ISSN
0031-9007
Article Type
Article
Citation
PHYSICAL REVIEW LETTERS, vol. 101, no. 7, page. 76402 - 76402, 2008-08-15
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