Optical Anisotropy of SrTiO3(110) for Different Surface Terminations

被引：4

作者：

Fleischer, Karsten ^{[1
]}

Kim, Sangsoo ^{[1
]}

Walls, Brian ^{[1
]}

Zhussupbekov, Kuanysh ^{[1
]}

Shvets, Igor V. ^{[1
]}

机构：

[1] Univ Dublin, Trinity Coll Dublin, Sch Phys, Dublin 2, Ireland

来源：

PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS | 2018年 / 255卷 / 04期

基金：

爱尔兰科学基金会;

关键词：

reflectance anisotropy spectroscopy; SrTiO3; surfaces; surface termination; SCANNING-TUNNELING-MICROSCOPY; ELECTRONIC-STRUCTURE; SPECTROSCOPY; SILICON; OXIDES;

D O I：

10.1002/pssb.201700459

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

In this work we investigate the SrTiO3(110) surface by reflectance anisotropy spectroscopy (RAS) at varying preparation steps including ex situ wet etching, high temperature oxygen annealing, as well as in situ vacuum annealing. Different surface terminations show distinctly different RAS spectra which are correlated to an altered surface stoichiometry measured by X-ray photoelectron spectroscopy (XPS) and an altered valence band structure measured by UV-photoelectron spectroscopy (UPS) in cases of conductive samples. We link the changes in the observed RAS spectra to various surface reconstructions, with particular focus of the signature of (3x1) and (1x4) reconstructed surfaces, and a metallic surface state observed in vacuum annealed SrTiO3.

引用

页数：7

共 32 条

[1] ANISOTROPIES IN THE ABOVE BAND-GAP OPTICAL-SPECTRA OF CUBIC SEMICONDUCTORS [J].

ASPNES, DE ;

STUDNA, AA .

PHYSICAL REVIEW LETTERS, 1985, 54 (17) :1956-1959

[2] DIRECT OPTICAL MEASUREMENT OF SURFACE DIELECTRIC RESPONSES - INTERRUPTED GROWTH ON (001) GAAS [J].

ASPNES, DE ;

CHANG, YC ;

STUDNA, AA ;

FLOREZ, LT ;

FARRELL, HH ;

HARBISON, JP .

PHYSICAL REVIEW LETTERS, 1990, 64 (02) :192-195

[3] 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

[4] Mapping the spatial distribution of charge carriers in LaAlO3/SrTiO3 heterostructures [J].

Basletic, M. ;

Maurice, J. -L. ;

Carretero, C. ;

Herranz, G. ;

Copie, O. ;

Bibes, M. ;

Jacquet, E. ;

Bouzehouane, K. ;

Fusil, S. ;

Barthelemy, A. .

NATURE MATERIALS, 2008, 7 (08) :621-625

[5] Surface structure of TiO2(011)-(2x1) -: art. no. 036104 [J].

Beck, TJ ;

Klust, A ;

Batzill, M ;

Diebold, U ;

Di Valentin, C ;

Selloni, A .

PHYSICAL REVIEW LETTERS, 2004, 93 (03) :036104-1

[6] 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

[7] Electronic structures of the SrTiO3(110) surface in different reconstructions [J].

Cao, Yanwei ;

Wang, Shuai ;

Liu, Shuming ;

Guo, Qinlin ;

Guo, Jiandong .

JOURNAL OF CHEMICAL PHYSICS, 2012, 137 (04) :515

[8] Surface and subsurface oxygen vacancies in anatase TiO2 and differences with rutile [J].

Cheng, Hongzhi ;

Selloni, Annabella .

PHYSICAL REVIEW B, 2009, 79 (09)

[9]

Enterkin JA, 2010, NAT MATER, V9, P245, DOI [10.1038/NMAT2636, 10.1038/nmat2636]

[10] Oxygen Vacancy Linear Clustering in a Perovskite Oxide [J].

Eom, Kitae ;

Choi, Euiyoung ;

Choi, Minsu ;

Han, Seungwu ;

Zhou, Hua ;

Lee, Jaichan .

JOURNAL OF PHYSICAL CHEMISTRY LETTERS, 2017, 8 (15) :3500-3505

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