Sr surface segregation and water cleaning for atomically controlled SrTiO3(001) substrates studied by photoemission spectroscopy

被引：13

作者：

Kobayashi, D

Hashimoto, R

Chikamatsu, A

Kumigashira, H ^{[1
]}

Oshima, M

Ohnishi, T

Lippmaa, M

Ono, K

Kawasaki, M

Koinuma, H

机构：

[1] Univ Tokyo, Dept Appl Chem, Tokyo 1138656, Japan

[2] Univ Tokyo, Dept Appl Phys, Tokyo 1138656, Japan

[3] Univ Tokyo, Inst Solid State Phys, Kashiwa, Chiba 2778581, Japan

[4] KEK, Inst Mat Struct Sci, Tsukuba, Ibaraki 3050801, Japan

[5] Tohoku Univ, Mat Res Inst, Sendai, Miyagi 9808577, Japan

[6] Tokyo Inst Technol, Mat & Struct Lab, Yokohama, Kanagawa 2268503, Japan

来源：

JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA | 2005年 / 144卷

关键词：

photoemission spectroscopy; SrTiO3; substrates; TiO2-terminated surface;

D O I：

10.1016/j.elspec.2005.01.167

中图分类号：

O433 [光谱学];

学科分类号：

0703 ; 070302 ;

摘要：

The chemical properties and electronic structures of atomically flat SrTiO3 (0 0 1) substrates with various surface treatments have been investigated by high-resolution synchrotron-radiation photoemission spectroscopy. We have found that an annealing process causes the segregation of Sr oxides at the TiO2-terminated surface. We demonstrate that the use of water-cleaning process is effective as a removal technique for Sr oxides segregated on TiO2-terminated surfaces with preserving the surface morphology and chemical bonding states of the topmost TiO2-terminated surfaces. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：443 / 446

页数：4

共 13 条

[1] INVESTIGATION OF PRECIPITATE FORMATION ON LASER-ABLATED YBA2CU3O7-DELTA THIN-FILMS [J].

GONG, JP ;

KAWASAKI, M ;

FUJITO, K ;

TSUCHIYA, R ;

YOSHIMOTO, M ;

KOINUMA, H .

PHYSICAL REVIEW B, 1994, 50 (05) :3280-3287

[2] SURFACE DEFECTS AND ELECTRONIC-STRUCTURE OF SRTIO3 SURFACES [J].

HENRICH, VE ;

DRESSELHAUS, G ;

ZEIGER, HJ .

PHYSICAL REVIEW B, 1978, 17 (12) :4908-4921

[3] Electronic structure in the band gap of lightly doped SrTiO3 by high-resolution x-ray absorption spectroscopy [J].

Higuchi, T ;

Tsukamoto, T ;

Kobayashi, K ;

Ishiwata, Y ;

Fujisawa, M ;

Yokoya, T ;

Yamaguchi, S ;

Shin, S .

PHYSICAL REVIEW B, 2000, 61 (19) :12860-12863

[4] A high-resolution synchrotron-radiation angle-resolved photoemission spectrometer with in situ oxide thin film growth capability [J].

Horiba, K ;

Ohguchi, H ;

Kumigashira, H ;

Oshima, M ;

Ono, K ;

Nakagawa, N ;

Lippmaa, M ;

Kawasaki, M ;

Koinuma, H .

REVIEW OF SCIENTIFIC INSTRUMENTS, 2003, 74 (07) :3406-3412

[5] Nanoscale composition analysis of atomically flat SrTiO3(001) by friction force microscopy [J].

Iwahori, K ;

Watanabe, S ;

Kawai, M ;

Mizuno, K ;

Sasaki, K ;

Yoshimoto, M .

JOURNAL OF APPLIED PHYSICS, 2000, 88 (12) :7099-7103

[6] ATOMIC CONTROL OF THE SRTIO3 CRYSTAL-SURFACE [J].

KAWASAKI, M ;

TAKAHASHI, K ;

MAEDA, T ;

TSUCHIYA, R ;

SHINOHARA, M ;

ISHIYAMA, O ;

YONEZAWA, T ;

YOSHIMOTO, M ;

KOINUMA, H .

SCIENCE, 1994, 266 (5190) :1540-1542

[7] Laser MBE of ceramic thin films for future electronics [J].

Koinuma, H ;

Kanda, N ;

Nishino, J ;

Ohtomo, A ;

Kubota, H ;

Kawasaki, M ;

Yoshimoto, M .

APPLIED SURFACE SCIENCE, 1997, 109 :514-519

[8] Atom technology for Josephson tunnel junctions:: SrTiO3 substrate surface [J].

Lippmaa, M ;

Takahashi, K ;

Ohtomo, A ;

Ohashi, S ;

Ohnishi, T ;

Nakagawa, N ;

Sato, T ;

Iwatsuki, M ;

Koinuma, H ;

Kawasaki, M .

MATERIALS SCIENCE AND ENGINEERING B-SOLID STATE MATERIALS FOR ADVANCED TECHNOLOGY, 1998, 56 (2-3) :111-116

[9] Structure change of TiO2-terminated SrTiO3(001) surfaces by annealing in O2 atmosphere and ultrahigh vacuum [J].

Nishimura, T ;

Ikeda, A ;

Namba, H ;

Morishita, T ;

Kido, Y .

SURFACE SCIENCE, 1999, 421 (03) :273-278

[10] Preparation of thermally stable TiO2-terminated SrTiO3(100) substrate surfaces [J].

Ohnishi, T ;

Shibuya, K ;

Lippmaa, M ;

Kobayashi, D ;

Kumigashira, H ;

Oshima, M ;

Koinuma, H .

APPLIED PHYSICS LETTERS, 2004, 85 (02) :272-274

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