Optical Spectroscopic Studies of the Metal-Insulator Transition Driven by All-In–All-Out Magnetic Ordering in 5d Pyrochlore Cd2Os2O7

Cited 10 time in webofscience Cited 0 time in scopus
445 Viewed 116 Downloaded
Title
Optical Spectroscopic Studies of the Metal-Insulator Transition Driven by All-In–All-Out Magnetic Ordering in 5d Pyrochlore Cd2Os2O7
Author(s)
Chang Hee Sohn; Hogyun Jeong; Hosub Jin; So Yeon Kim; Luke James Sandilands; Hyun Ju Park; K. W. Kim; S. J. Moon; Deok-Yong Cho; J. Yamaura; Z. Hiroi; Taewon Noh
Publication Date
2015-12
Journal
PHYSICAL REVIEW LETTERS, v.115, no.26, pp.266402 -
Publisher
AMER PHYSICAL SOC
Abstract
We investigated the metal-insulator transition (MIT) driven by all-in–all-out (AIAO) antiferromagnetic ordering in the 5d pyrochlore Cd 2 Os 2 O 7 using optical spectroscopy and first-principles calculations. We showed that the temperature evolution in the band-gap edge and free carrier density were consistent with rigid upward (downward) shifts of electron (hole) bands, similar to the case of Lifshitz transitions. The delicate relationship between the band gap and free carrier density provides experimental evidence for the presence of an AIAO metallic phase, a natural consequence of such MITs. The associated spectral weight change at high energy and first-principles calculations further support the origin of the MIT from the band shift near the Fermi level. Our data consistently support that the MIT induced by AIAO ordering in Cd 2 Os 2 O 7 is not close to a Slater type but instead to a Lifshitz type.
URI
https://pr.ibs.re.kr/handle/8788114/1829
ISSN
0031-9007
Appears in Collections:
Center for Correlated Electron Systems(강상관계 물질 연구단) > Journal Papers (저널논문)
Files in This Item:
PRL 115, 266402 (2015).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