Bulk and surface sensitive high-resolution photoemission study of Mott-Hubbard systems SrVO3 and CaVO3

被引：5
作者：
Eguchi, R.
Kiss, T.
Tsuda, S.
Shimojima, T.
Mizokami, T.
Chainani, A.
Shin, S.
Inoue, I. H.
Togashi, T.
Watanabe, S.
Zhang, C. Q.
Chen, C. T.
Arita, M.
Shimada, K.
Namatame, H.
Taniguchi, M.
机构：
[1] Univ Tokyo, ISSP, Kashiwa, Chiba 2778581, Japan
[2] AIST, CERC, Tsukuba, Ibaraki 3058562, Japan
[3] Chinese Acad Sci, Beijing Ctr Crystal R&D, Beijing 100080, Peoples R China
[4] Hiroshima Univ, Hiroshima Synchotron Radiat Ctr, Higashihiroshima, Hiroshima 7398526, Japan
[5] Hiroshima Univ, Grad Sch Sci, Higashihiroshima, Hiroshima 7398526, Japan
来源：
PHYSICA B-CONDENSED MATTER | 2006年 / 378-80卷 / 330-331期
关键词：
SrVO3; CaVO3; bulk sensitive photoemission; Mott-Hubbard systems;
D O I：
10.1016/j.physb.2006.01.120
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
We study the electronic structure of Mott-Hubbard systems SrVO3 and CaVO3 with bulk and surface sensitive high-resolution photoemission spectroscopy using low-energy photons (hv = 7-21 eV), including a VUV laser. A clear suppression of the density of states within similar to 0.2 eV of the Fermi level (E-F) is found. The coherent band in SrVO3 and CaVO3 is shown to consist of surface and bulk-derived features. The results indicate that the stronger distortion on the surface of CaVO3 compared to SrVO3 is directly reflected in the coherent DOS at EF, consistent with recent theory. (c) 2006 Elsevier B.V. All rights reserved.
引用
收藏
页码：330 / 331
页数：2
相关论文
共 15 条
[1]   High-resolution and low-temperature photoemission spectroscopy at the HiSOR helical-undulator beamline [J].
Arita, M ;
Shimada, K ;
Namatame, H ;
Taniguchi, M .
SURFACE REVIEW AND LETTERS, 2002, 9 (01) :535-539
[2]  
EGUCHI R, IN PRESS PHYS REV LE, P80501
[3]   Bandwidth control in a perovskite-type 3d1-correlated metal Ca1-xSrxVO3.: I.: Evolution of the electronic properties and effective mass [J].
Inoue, IH ;
Goto, O ;
Makino, H ;
Hussey, NE ;
Ishikawa, M .
PHYSICAL REVIEW B, 1998, 58 (08) :4372-4383
[4]   SYSTEMATIC DEVELOPMENT OF THE SPECTRAL-FUNCTION IN THE 3D(1) MOTT-HUBBARD SYSTEM CA1-XSRXVO3 [J].
INOUE, IH ;
HASE, I ;
AIURA, Y ;
FUJIMORI, A ;
HARUYAMA, Y ;
MARUYAMA, T ;
NISHIHARA, Y .
PHYSICAL REVIEW LETTERS, 1995, 74 (13) :2539-2542
[5]   Photoemission spectroscopic evidence of gap anisotropy in an f-electron superconductor -: art. no. 057001 [J].
Kiss, T ;
Kanetaka, F ;
Yokoya, T ;
Shimojima, T ;
Kanai, K ;
Shin, S ;
Onuki, Y ;
Togashi, T ;
Zhang, C ;
Chen, CT ;
Watanabe, S .
PHYSICAL REVIEW LETTERS, 2005, 94 (05)
[6]   Surface versus bulk Coulomb correlations in photoemission spectra of SrVO3 and CaVO3 -: art. no. 096401 [J].
Liebsch, A .
PHYSICAL REVIEW LETTERS, 2003, 90 (09) :4
[7]   SPECTRAL WEIGHT TRANSFER AND MASS RENORMALIZATION IN MOTT-HUBBARD SYSTEMS SRVO3 AND CAVO3 - INFLUENCE OF LONG-RANGE COULOMB INTERACTION [J].
MORIKAWA, K ;
MIZOKAWA, T ;
KOBAYASHI, K ;
FUJIMORI, A ;
EISAKI, H ;
UCHIDA, S ;
IGA, F ;
NISHIHARA, Y .
PHYSICAL REVIEW B, 1995, 52 (19) :13711-13714
[8]   Mott transition and suppression of orbital fluctuations in orthorhombic 3d1 perovskites -: art. no. 176403 [J].
Pavarini, E ;
Biermann, S ;
Poteryaev, A ;
Lichtenstein, AI ;
Georges, A ;
Andersen, OK .
PHYSICAL REVIEW LETTERS, 2004, 92 (17) :176403-1
[9]   Metallic surface of a Mott insulator-Mott insulating surface of a metal [J].
Potthoff, M ;
Nolting, W .
PHYSICAL REVIEW B, 1999, 60 (11) :7834-7849
[10]   Correlation and surface effects in vanadium oxides [J].
Schwieger, S ;
Potthoff, M ;
Nolting, W .
PHYSICAL REVIEW B, 2003, 67 (16)
12