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

• 作者: 刘晨 吴蕊 奎热西·伊布拉欣 张双红 张念 王嘉鸥 钱海杰 雷涛
• 来源期刊: 中国物理B（英文版）
• 关键词: strontium titanate ultrahigh vacuum annealing synchrotron radiation photoemission spectroscopy
• 年，卷（期）: 2015,（2）
• 页码范围: 027901-1-027901-4
• 页数: 1页
• 语种: 英文
• DOI: 10.1088/1674-1056/24/2/027901

摘要

The effect of temperature on the electronic structure of Nb-doped SrTiO3 (100) surface is investigated by high-resoluyion synchrotron radiation photoemission spectroscopy. According to x-ray photoemission spectroscopy (XPS) re-sults, at an annealing temperature of less than 700?C, the adsorbed carbon and hydroxyl on 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 surface after annealing at 920?C for one hour.