Changes in the surface topography and electronic structure of SrTiO3(110) single crystals heated under oxidizing and reducing conditions

被引：19
作者：
Gunhold, A
Gömann, K
Beuermann, L
Kempter, V
Borchardt, G
Maus-Friedrichs, W
机构：
[1] Tech Univ Clausthal, Inst Phys & Phys Technol, D-38678 Clausthal Zellerfeld, Germany
[2] Inst Met, D-38678 Clausthal Zellerfeld, Germany
来源：
SURFACE SCIENCE | 2004年 / 566卷
关键词：
single crystal surfaces; photoelectron spectroscopy; Auger electron spectroscopy; atomic force microscopy; surface relaxation and reconstruction;
D O I：
10.1016/j.susc.2004.05.030
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Strontium titanate (SrTiO3) is a promising material for resistive high temperature oxygen sensors. Unfortunately, thermal treatment results in undesirable surface reconstruction and the formation of secondary phases. Each of the three stable surface orientations ((10 0), (110) and (111)) shows a characteristic reconstruction of the topmost layers. To investigate these changes in more detail, SrTiO3(110) single crystals were heated up to 1000 degreesC in ultrahigh vacuum and synthetic air, respectively. Atomic force microscopy (AFM) was applied to characterize the surface topography. Metastable impact electron spectroscopy (MIES) and Auger electron spectroscopy (AES) yielded information on the electronic structure and the chemical composition of the surface and the near surface region. Under all investigated conditions microfaceting of the (110) surface could be observed resulting in TiO2-terminated ridges. (C) 2004 Elsevier B.V. All rights reserved.
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页码：105 / 110
页数：6
相关论文
共 13 条
[1]   STRUCTURE AND ELECTRONIC STATES ON REDUCED SRTIO3(110) SURFACE OBSERVED BY SCANNING-TUNNELING-MICROSCOPY AND SPECTROSCOPY [J].
BANDO, H ;
AIURA, Y ;
HARUYAMA, Y ;
SHIMIZU, T ;
NISHIHARA, Y .
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B, 1995, 13 (03) :1150-1154
[2]   Investigation of the SrTiO3 (110) surface by means of LEED, scanning tunneling microscopy and Auger spectroscopy [J].
Brunen, J ;
Zegenhagen, J .
SURFACE SCIENCE, 1997, 389 (1-3) :349-365
[3]  
Gomann K., 2003, MAT RES SOC P, V756
[4]   Study of the electronic and atomic structure of thermally treated SrTiO3(110) surfaces [J].
Gunhold, A ;
Beuermann, L ;
Gömann, K ;
Borchardt, G ;
Kempter, V ;
Maus-Friedrichs, W ;
Piskunov, S ;
Kotomin, EA ;
Dorfman, S .
SURFACE AND INTERFACE ANALYSIS, 2003, 35 (12) :998-1003
[5]   Nanostructures on La-doped SrTiO3 surfaces [J].
Gunhold, A ;
Gömann, K ;
Beuermann, L ;
Kempter, V ;
Borchardt, G ;
Maus-Friedrichs, W .
ANALYTICAL AND BIOANALYTICAL CHEMISTRY, 2003, 375 (07) :924-928
[6]   Island formation on 0.1 at.% La-doped SrTiO3(100) at elevated temperatures under reducing conditions [J].
Gunhold, A ;
Beuermann, L ;
Frerichs, M ;
Kempter, V ;
Gömann, K ;
Borchardt, G ;
Maus-Friedrichs, W .
SURFACE SCIENCE, 2003, 523 (1-2) :80-88
[7]   Geometric structure and chemical composition of SrTiO3 surfaces heated under oxidizing and reducing conditions [J].
Gunhold, A ;
Gömann, K ;
Beuermann, L ;
Frerichs, M ;
Borchardt, G ;
Kempter, V ;
Maus-Friedrichs, W .
SURFACE SCIENCE, 2002, 507 :447-452
[8]   The characterization of SrTiO3(001) with MIES, UPS(HeI) and first-principles calculations [J].
Maus-Friedrichs, W ;
Frerichs, M ;
Gunhold, A ;
Krischok, S ;
Kempter, V ;
Bihlmayer, G .
SURFACE SCIENCE, 2002, 515 (2-3) :499-506
[9]   TIME EVOLUTION OF THE POTENTIAL DISTRIBUTION IN EARTH ALKALINE TITANATES UNDER DC VOLTAGE STRESS [J].
RAITH, A ;
REIJNEN, P ;
WASER, R .
BERICHTE DER BUNSEN-GESELLSCHAFT-PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 1988, 92 (12) :1516-1522
[10]   INFLUENCE OF BULK AND INTERFACE PROPERTIES ON THE ELECTRIC TRANSPORT IN ABO3 PEROVSKITES [J].
STUMPE, R ;
WAGNER, D ;
BAUERLE, D .
PHYSICA STATUS SOLIDI A-APPLIED RESEARCH, 1983, 75 (01) :143-154
12