BROWSE

Related Scientist

Researcher

조두희
원자제어 저차원 전자계 연구단
more info

Interplay of electron-electron and electron-phonon interactions in the low-temperature phase of 1T-TaS2

Cited 13 time in webofscience Cited 0 time in scopus
445 Viewed 1,420 Downloaded
Title
Interplay of electron-electron and electron-phonon interactions in the low-temperature phase of 1T-TaS2
Author(s)
Doohee Cho; Cho Y.-H.; Cheong S.-W.; Kim K.-S.; Han Woong Yeom
Publication Date
2015-08
Journal
PHYSICAL REVIEW B, v.92, no.8, pp.085132 -
Publisher
AMER PHYSICAL SOC
Abstract
We investigate the interplay of the electron-electron and electron-phonon interactions in the electronic structure of an exotic insulating state in the layered dichalcogenide 1T-TaS2, where the charge-density-wave (CDW) order coexists with a Mott correlation gap. Scanning tunneling microscopy and spectroscopy measurements with high spatial and energy resolution determine unambiguously the CDW and the Mott gap as 0.20-0.24 eV and 0.32 eV, respectively, through the real space electron phases measured across the multiply formed energy gaps. An unusual local reduction of the Mott gap is observed on the defect site, which indicates the renormalization of the on-site Coulomb interaction by the electron-phonon coupling as predicted by the Hubbard-Holstein model. The Mott-gap renormalization provides insight into the disorder-induced quasimetallic phases of 1T-TaS2. © 2015 American Physical Society. ©2015 American Physical Society
URI
http://pr.ibs.re.kr/handle/8788114/1931
DOI
10.1103/PhysRevB.92.085132
ISSN
1098-0121
Appears in Collections:
Center for Artificial Low Dimensional Electronic Systems(원자제어 저차원 전자계 연구단) > Journal Papers (저널논문)
Files in This Item:
2015_21 PRB_조두희(염한웅)_20150818(Interplay~).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