Open Access System for Information Sharing

Login Library

 

Article
Cited 26 time in webofscience Cited 23 time in scopus
Metadata Downloads

Latent instabilities in metallic LaNiO3 films by strain control of Fermi-surface topology

Title
Latent instabilities in metallic LaNiO3 films by strain control of Fermi-surface topology
Authors
Hyang Keun YooSeung Ill HyunLuca MoreschiniHyeong-Do KimYoung Jun ChangChang Hee SohnDa Woon JeongSoobin SinnYong Su KimAaron BostwickEli RotenbergShim, JHTae Won Noh
Date Issued
Mar-2015
Publisher
NATURE PUBLISHING GROUP
Abstract
Strain control is one of the most promising avenues to search for new emergent phenomena in transition-metal-oxide films. Here, we investigate the strain-induced changes of electronic structures in strongly correlated LaNiO 3 (LNO) films, using angle-resolved photoemission spectroscopy and the dynamical mean-field theory. The strongly renormalized e g -orbital bands are systematically rearranged by misfit strain to change its fermiology. As tensile strain increases, the hole pocket centered at the A point elongates along the k z -axis and seems to become open, thus changing Fermi-surface (FS) topology from three- to quasi-two-dimensional. Concomitantly, the FS shape becomes flattened to enhance FS nesting. A FS superstructure with Q 1 = (1/2,1/2,1/2) appears in all LNO films, while a tensile-strained LNO film has an additional Q 2 = (1/4,1/4,1/4) modulation, indicating that some instabilities are present in metallic LNO films. Charge disproportionation and spin-density-wave fluctuations observed in other nickelates might be their most probable origins.
URI
http://oasis.postech.ac.kr/handle/2014.oak/13176
ISSN
2045-2322
Article Type
Article
Citation
SCIENTIFIC REPORTS, vol. 5, 2015-03
Files in This Item:

qr_code

  • mendeley

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

Related Researcher

Researcher

심지훈SHIM, JI HOON
Convergence Science and Technology
Read more

Views & Downloads

Browse