Bulk- and surface-sensitive high-resolution photoemission study of two mott-hubbard systems: SrVO3 and CaVO3

被引：64

作者：

Eguchi, R ^{[1
]}

Kiss, T

Tsuda, S

Shimojima, T

Mizokami, T

Yokoya, T

Chainani, A

Shin, S

Inoue, IH

Togashi, T

Watanabe, S

Zhang, CQ

Chen, CT

Arita, M

Shimada, K

Namatame, H

Taniguchi, M

机构：

[1] Univ Tokyo, ISSP, Kashiwa, Chiba 2778581, Japan

[2] RIKEN, SPring Ctr 8, Sayo, Hyogo 6795148, Japan

[3] AIST, CERC, Tsukuba, Ibaraki 3058562, Japan

[4] Chinese Acad Sci, Beijing Ctr Crystal R&D, Beijing 100080, Peoples R China

[5] Hiroshima Univ, Ctr Synchrotron Radiat, Higashihiroshima 7398526, Japan

[6] Hiroshima Univ, Grad Sch Sci, Higashihiroshima 7398526, Japan

来源：

PHYSICAL REVIEW LETTERS | 2006年 / 96卷 / 07期

关键词：

D O I：

10.1103/PhysRevLett.96.076402

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We study the electronic structure of Mott-Hubbard systems SrVO3 and CaVO3 with bulk and surface-sensitive high-resolution photoemission spectroscopy, using a vacuum ultraviolet laser, synchrotron radiation, and a discharge lamp (h nu=7-21 eV). A systematic suppression of the density of states (DOS) within similar to 0.2 eV of the Fermi level (E-F) is found on decreasing photon energy, i.e., on increasing bulk sensitivity. The coherent band in SrVO3 and CaVO3 is shown to consist of surface and bulk-derived features, separated in energy. The stronger distortion on surface of CaVO3 compared to SrVO3 leads to a higher surface metallicity in the coherent DOS at E-F, consistent with recent theory.

引用

页数：4

共 36 条

[1] High-resolution and low-temperature photoemission spectroscopy at the HiSOR helical-undulator beamline [J].