Temperature effect on the electronic structure of Nb:SrTiO3 (100) surface

doi:10.1088/1674-1056/24/2/027901

›› 2015, Vol. 24 ›› Issue (2): 27901-027901.doi: 10.1088/1674-1056/24/2/027901

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇下一篇

Temperature effect on the electronic structure of Nb:SrTiO₃ (100) surface

张双红^{a b}, 王嘉鸥^b, 钱海杰^b, 吴蕊^b, 张念^b, 雷涛^b, 刘晨^b, 奎热西·伊布拉欣^b

a School of Physics and Materials Science, Anhui University, Hefei 230039, China;
b Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China

收稿日期:2014-06-09 修回日期:2014-09-30 出版日期:2015-02-05 发布日期:2015-02-05
基金资助:
Project supported by the Funds from the Chinese Academy of Sciences (Grant No. 1G2009312311750101) and the National Natural Science Foundation of China (Grant No. 11375228).

Temperature effect on the electronic structure of Nb:SrTiO₃ (100) surface

Zhang Shuang-Hong (张双红)^{a b}, Wang Jia-Ou (王嘉鸥)^b, Qian Hai-Jie (钱海杰)^b, Wu Rui (吴蕊)^b, Zhang Nian (张念)^b, Lei Tao (雷涛)^b, Liu Chen (刘晨)^b, Kurash Ibrahim (奎热西·伊布拉欣)^b

a School of Physics and Materials Science, Anhui University, Hefei 230039, China;
b Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China

Received:2014-06-09 Revised:2014-09-30 Online:2015-02-05 Published:2015-02-05
Contact: Wang Jia-Ou E-mail:wangjo@ihep.ac.cn
Supported by:
Project supported by the Funds from the Chinese Academy of Sciences (Grant No. 1G2009312311750101) and the National Natural Science Foundation of China (Grant No. 11375228).

摘要/Abstract

摘要： The effect of temperature on the electronic structure of Nb-doped SrTiO₃ (100) surface is investigated by high-resolution synchrotron radiation photoemission spectroscopy. According to the x-ray photoemission spectroscopy (XPS) results, at an annealing temperature of less than 700 ℃, the adsorbed carbon and hydroxyl on the STO surface could be removed, to expose the fresh intrinsic surface with a constant ratio of Ti/O. It is obvious that the STO would be doped by Ca⁺ impurities of bulks and O vacancies in the surface after annealing at 920 ℃ for one hour.

关键词: strontium titanate, ultrahigh vacuum annealing, synchrotron radiation photoemission spectroscopy

Abstract: The effect of temperature on the electronic structure of Nb-doped SrTiO₃ (100) surface is investigated by high-resolution synchrotron radiation photoemission spectroscopy. According to the x-ray photoemission spectroscopy (XPS) results, at an annealing temperature of less than 700 ℃, the adsorbed carbon and hydroxyl on the STO surface could be removed, to expose the fresh intrinsic surface with a constant ratio of Ti/O. It is obvious that the STO would be doped by Ca⁺ impurities of bulks and O vacancies in the surface after annealing at 920 ℃ for one hour.

Key words: strontium titanate, ultrahigh vacuum annealing, synchrotron radiation photoemission spectroscopy

中图分类号: (Photoemission and photoelectron spectra)

79.60.-i

73.20.At (Surface states, band structure, electron density of states) 81.65.Cf (Surface cleaning, etching, patterning)

张双红, 王嘉鸥, 钱海杰, 吴蕊, 张念, 雷涛, 刘晨, 奎热西·伊布拉欣. Temperature effect on the electronic structure of Nb:SrTiO₃ (100) surface[J]. , 2015, 24(2): 27901-027901.

Zhang Shuang-Hong (张双红), Wang Jia-Ou (王嘉鸥), Qian Hai-Jie (钱海杰), Wu Rui (吴蕊), Zhang Nian (张念), Lei Tao (雷涛), Liu Chen (刘晨), Kurash Ibrahim (奎热西·伊布拉欣). Temperature effect on the electronic structure of Nb:SrTiO₃ (100) surface[J]. Chin. Phys. B, 2015, 24(2): 27901-027901.

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Temperature effect on the electronic structure of Nb:SrTiO₃ (100) surface

Temperature effect on the electronic structure of Nb:SrTiO₃ (100) surface

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