Open Access System for Information Sharing

Login Library

 

Article
Cited 46 time in webofscience Cited 51 time in scopus
Metadata Downloads

Photoemission study of (V1-xMx)(2)O-3 (M=Cr,Ti) SCIE SCOPUS

Title
Photoemission study of (V1-xMx)(2)O-3 (M=Cr,Ti)
Authors
Mo, SKKim, HDDenlinger, JDAllen, JWPark, JHSekiyama, AYamasaki, ASuga, SSaitoh, YMuro, TMetcalf, P
Date Issued
2006-10
Publisher
AMERICAN PHYSICAL SOC
Abstract
We present high-resolution bulk-sensitive photoemission spectra of (V1-xMx)(2)O-3 (M=Cr,Ti). The measurements were made for the paramagnetic metal (PM), paramagnetic insulator (PI), and antiferromagnetic insulator (AFI) phases of (V1-xMx)(2)O-3 with the samples of x=0, 0.012, and 0.028 for Cr doping and x=0.01 for Ti doping. In the PM phase, we observe a prominent quasiparticle peak in general agreement with theory, which combines dynamical mean-field theory with the local density approximation (LDA+DMFT). The quasiparticle peak shows a significantly larger peak width and weight than in the theory. For both the PI and AFI phases, the vanadium 3d parts of the valence spectra are not simple one peak structures. For the PI phase, there is not yet a good theoretical understanding of these structures. The size of the electron removal gap increases, and spectral weight accumulates in the energy range closer to the chemical potential, when the PI to AFI transition occurs. Spectra taken in the same phases with different compositions show interesting monotonic changes as the dopant concentration increases, regardless of the dopant species. With increased Cr-doping, the AFI phase gap decreases and the PI phase gap increases.
URI
https://oasis.postech.ac.kr/handle/2014.oak/12151
DOI
10.1103/PhysRevB.74.165101
ISSN
1098-0121
Article Type
Article
Citation
PHYSICAL REVIEW B, vol. 74, no. 16, 2006-10
Files in This Item:

qr_code

  • mendeley

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

Related Researcher

Views & Downloads

Browse