BROWSE

Related Scientist

Researcher

강상관계 물질 연구단
강상관계 물질 연구단
more info

Thickness-dependent electronic structure in ultrathin LaNiO3 films under tensile strain

Cited 11 time in webofscience Cited 0 time in scopus
501 Viewed 165 Downloaded
Title
Thickness-dependent electronic structure in ultrathin LaNiO3 films under tensile strain
Author(s)
Hyang Keun Yoo; Seung Ill Hyun; Young Jun Chang; Luca Moreschini; Chang Hee Sohn; Hyeong-Do Kim; Aaron Bostwick; Eli Rotenberg; Ji Hoon Shim; Tae Won Noh
Publication Date
2016-01
Journal
PHYSICAL REVIEW B, v.93, no.3, pp.035141 -
Publisher
AMER PHYSICAL SOC
Abstract
We investigated electronic-structure changes of tensile-strained ultrathin LaNiO3 (LNO) films from ten to one unit cells (UCs) using angle-resolved photoemission spectroscopy (ARPES). We found that there is a critical thickness tc between four and three UCs below which Ni eg electrons are confined in two-dimensional space. Furthermore, the Fermi surfaces (FSs) of LNO films below tc consist of two orthogonal pairs of one-dimensional (1D) straight parallel lines. Such a feature is not accidental as observed in constant-energy surfaces at all binding energies, which is not explained by first-principles calculations or the dynamical mean-field theory. The ARPES spectra also show anomalous spectral behaviors, such as no quasiparticle peak at the Fermi momentum but fast band dispersion comparable to the bare-band one, which is typical in a 1D system. As its possible origin, we propose 1D FS nesting, which also accounts for FS superstructures observed in ARPES. ©2016 American Physical Society
URI
http://pr.ibs.re.kr/handle/8788114/2384
ISSN
2469-9950
Appears in Collections:
Center for Correlated Electron Systems(강상관계 물질 연구단) > Journal Papers (저널논문)
Files in This Item:
강상관계-PhysRevB.93.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