Insulating nature of Na2IrO3: Mott-type or Slater-type
SCIE
SCOPUS
- Title
- Insulating nature of Na2IrO3: Mott-type or Slater-type
- Authors
- Kim, M; Kim, BH; Min, BI
- Date Issued
- 2016-05-18
- Publisher
- AMER PHYSICAL SOC
- Abstract
- We have investigated temperature-dependent electronic structures of Na2IrO3 to unravel its insulating nature. Employing the combined scheme of the density functional theory (DFT) and the dynamical mean-field theory (DMFT), we have shown that the insulating state persists even above the Neel temperature (T-N), which reveals that Na2IrO3 is classified as a Mott-type insulator. The measured photoemission spectrum in the paramagnetic state is well described by the electronic structure obtained by the DFT+DMFT for the insulating state above TN. The analysis of optical conductivity, however, suggests that the nonlocal correlation effect is also important in Na2IrO3. Therefore, Na2IrO3 is not a standard Mott insulator in that the extended nature and the nonlocal correlation effect of Ir 5d electrons are important as well in describing its electronic and magnetic properties.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/39270
- DOI
- 10.1103/PhysRevB.93.195135
- ISSN
- 2469-9950
- Article Type
- Article
- Citation
- PHYSICAL REVIEW B, vol. 93, no. 19, page. 195135 - 195135, 2016-05-18
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