Electronic structure of a superconducting topological insulator Sr-doped Bi2Se3
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- C. Q. Han
- Shanghai Jiao Tong University 1 Key Laboratory of Artificial Structures and Quantum Control (Ministry of Education), Department of Physics and Astronomy, , Shanghai 200240, China
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- H. Li
- Chinese Academy of Science 2 Shanghai Institute of Microsystem and Information Technology, , Shanghai 200050, China
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- W. J. Chen
- Shanghai Jiao Tong University 1 Key Laboratory of Artificial Structures and Quantum Control (Ministry of Education), Department of Physics and Astronomy, , Shanghai 200240, China
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- Fengfeng Zhu
- Shanghai Jiao Tong University 1 Key Laboratory of Artificial Structures and Quantum Control (Ministry of Education), Department of Physics and Astronomy, , Shanghai 200240, China
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- Meng-Yu Yao
- Shanghai Jiao Tong University 1 Key Laboratory of Artificial Structures and Quantum Control (Ministry of Education), Department of Physics and Astronomy, , Shanghai 200240, China
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- Z. J. Li
- Chinese Academy of Science 2 Shanghai Institute of Microsystem and Information Technology, , Shanghai 200050, China
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- M. Wang
- Chinese Academy of Science 2 Shanghai Institute of Microsystem and Information Technology, , Shanghai 200050, China
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- Bo F. Gao
- Chinese Academy of Science 2 Shanghai Institute of Microsystem and Information Technology, , Shanghai 200050, China
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- D. D. Guan
- Shanghai Jiao Tong University 1 Key Laboratory of Artificial Structures and Quantum Control (Ministry of Education), Department of Physics and Astronomy, , Shanghai 200240, China
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- Canhua Liu
- Shanghai Jiao Tong University 1 Key Laboratory of Artificial Structures and Quantum Control (Ministry of Education), Department of Physics and Astronomy, , Shanghai 200240, China
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- C. L. Gao
- Shanghai Jiao Tong University 1 Key Laboratory of Artificial Structures and Quantum Control (Ministry of Education), Department of Physics and Astronomy, , Shanghai 200240, China
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- Dong Qian
- Shanghai Jiao Tong University 1 Key Laboratory of Artificial Structures and Quantum Control (Ministry of Education), Department of Physics and Astronomy, , Shanghai 200240, China
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- Jin-Feng Jia
- Shanghai Jiao Tong University 1 Key Laboratory of Artificial Structures and Quantum Control (Ministry of Education), Department of Physics and Astronomy, , Shanghai 200240, China
書誌事項
- 公開日
- 2015-10-26
- DOI
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- 10.1063/1.4934590
- 公開者
- AIP Publishing
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説明
<jats:p>Using high-resolution angle-resolved photoemission spectroscopy and scanning tunneling microscopy/spectroscopy, the atomic and low energy electronic structure of the Sr-doped superconducting topological insulators (SrxBi2Se3) was studied. Scanning tunneling microscopy shows that most of the Sr atoms are not in the van der Waals gap. After Sr doping, the Fermi level was found to move further upwards when compared with the parent compound Bi2Se3, which is consistent with the low carrier density in this system. The topological surface state was clearly observed, and the position of the Dirac point was determined in all doped samples. The surface state is well separated from the bulk conduction bands in the momentum space. The persistence of separated topological surface state combined with small Fermi energy makes this superconducting material a very promising candidate for the time reversal invariant topological superconductor.</jats:p>
収録刊行物
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- Applied Physics Letters
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Applied Physics Letters 107 (17), 171602-, 2015-10-26
AIP Publishing
