Filling of the Mott-Hubbard Gap in the High Temperature Photoemission Spectrum of (V0.972Cr0.028)2O3

作     者：S.-K. Mo H.-D. Kim J. W. Allen G.-H. Gweon J. D. Denlinger J.-H. Park A. Sekiyama A. Yamasaki S. Suga P. Metcalf K. Held 

作者机构：Randall Laboratory of Physics University of Michigan Ann Arbor Michigan 48109 USA Pohang Accelerator Laboratory Pohang 790-784 Korea Advanced Light Source Lawrence Berkeley National Laboratory Berkeley California 94720 USA Department of Physics Pohang University of Science and Technology Pohang 790-784 Korea Department of Material Physics Graduate School of Engineering Science Osaka University 1-3 Machikaneyama Toyonaka Osaka 560-8531 Japan Department of Physics Purdue University West Lafayette Indiana 47907 USA Max Planck Institute for Solid State Research Heisenbergstrasse 1 D-70569 Stuttgart Germany 

出 版 物：《Physical Review Letters》 (Phys Rev Lett)

年 卷 期：2004年第93卷第7期

页      面：076404-076404页

核心收录：

学科分类：07[理学] 0702[理学-物理学] 

基　　金：JASRI, (2000B0335-NS-np) National Science Foundation, NSF University of Michigan, U-M University of Montana, UM, (10CE2004, DMR-03-02825) University of Montana, UM Ministry of Education, Culture, Sports, Science and Technology, MEXT Pohang University of Science and Technology, POSTECH Korea Science and Engineering Foundation, KOSEF 

主　　题：Photoemission 

摘      要：Photoemission spectra of the paramagnetic insulating phase of (V0.972Cr0.028)2O3, taken in ultrahigh vacuum up to the unusually high temperature (T) of 800 K, reveal a property unique to the Mott-Hubbard (MH) insulator that has not been observed previously. With increasing T the MH gap is filled by spectral weight transfer, in qualitative agreement with high-T theoretical calculations combining dynamical mean field theory and band theory in the local density approximation.