Spin-orbit coupling induced band structure change and orbital character of epitaxial IrO2 films

Cited 6 time in webofscience Cited 0 time in scopus
630 Viewed 921 Downloaded
Title
Spin-orbit coupling induced band structure change and orbital character of epitaxial IrO2 films
Author(s)
Woo Jin Kim; So Yeun Kim; Choong Hyun Kim; Chang Hee Sohn; Oleksandr B Korenta; Seung Chul Chae; Tae Won Noh
Publication Date
2016-01
Journal
PHYSICAL REVIEW B, v.93, no.4, pp.045104 -
Publisher
AMER PHYSICAL SOC
Abstract
We investigated the electronic structure of IrO 2 to address the controversy regarding spin-orbit coupling (SOC) effects in metallic 5d transition-metal oxides. Two issues have come to the forefront: (1) SOC effects on electronic structure and physical properties of IrO 2 and (2) the possible formation of a novel ground state in this material, the J eff =1/2 state. To better understand the SOC mechanism, we grew epitaxial IrO 2 films whose dc resistivity values were comparable with those of a single crystal. We obtained polarization-dependent optical and x-ray absorption spectra (XAS) and compared these results with those acquired using the generalized gradient approximation (GGA) and GGA+SOC calculations. From the optical spectra, peak structures were identified at 0.4 and 2.0 eV, which could only be explained using the GGA+SOC calculation. This suggests that SOC plays an important role in the electronic structure of IrO 2 . From the polarization-dependent O1s XAS spectra, we observed that the empty state near the Fermi level lacks involvement of an Ir d xy orbital. Despite the importance of SOC in IrO 2 , the J eff =1/2 state does not form in metallic IrO 2 .©2016 American Physical Society
URI
https://pr.ibs.re.kr/handle/8788114/1819
ISSN
2469-9950
Appears in Collections:
Center for Correlated Electron Systems(강상관계 물질 연구단) > Journal Papers (저널논문)
Files in This Item:
Spin-orbit coupling induced band structure change and orbital character of epitaxial IrO2 films.pdfDownload

qrcode

  • facebook

    twitter

  • Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.
해당 아이템을 이메일로 공유하기 원하시면 인증을 거치시기 바랍니다.

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

Browse