Superconductivity with Topological Surface State in SrxBi₂Se₃

Zhongheng Liu; Xiong Yao; Jifeng Shao; Ming Zuo; Li Pi; Shun Tan; Changjin Zhang; Yuheng Zhang

doi:10.1021/jacs.5b06815

Superconductivity with Topological Surface State in SrxBi₂Se₃

J Am Chem Soc. 2015 Aug 26;137(33):10512-5. doi: 10.1021/jacs.5b06815. Epub 2015 Aug 14.

Authors

Zhongheng Liu^{1

2}, Xiong Yao^{1

2}, Jifeng Shao^{1

2}, Ming Zuo², Li Pi^{1

2

3}, Shun Tan², Changjin Zhang^{1

2

3}, Yuheng Zhang^{1

2

3}

Affiliations

¹ High Magnetic Field Laboratory, Chinese Academy of Sciences and University of Science and Technology of China , Hefei 230026, PR China.
² Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China , Hefei 230026, PR China.
³ Collaborative Innovation Center of Advanced Microstructures, Nanjing University , Nanjing 210093, PR China.

PMID: 26262431
DOI: 10.1021/jacs.5b06815

Abstract

By intercalation of alkaline earth metal Sr in Bi2Se3, superconductivity with large shielding volume fraction (∼91.5% at 0.5 K) has been achieved in Sr0.065Bi2Se3. Analysis of the Shubnikov-de Hass oscillations confirms the half-shift expected from a Dirac spectrum, giving transport evidence of the existence of surface states. Importantly, SrxBi2Se3 superconductor is stable under air, making SrxBi2Se3 an ideal material base for investigating topological superconductivity.