Superconductivity with Topological Surface State in SrxBi2Se3

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• 作者：Zhongheng Liu ; Xiong Yao ; Jifeng Shao ; Ming Zuo ; Li Pi ; Shun Tan ; Changjin Zhang ; Yuheng Zhang
• 刊名：Journal of the American Chemical Society
• 出版年：2015
• 出版时间：August 26, 2015
• 年：2015
• 卷：137
• 期：33
• 页码：10512-10515
• 全文大小：322K
• ISSN：1520-5126

文摘

By intercalation of alkaline earth metal Sr in Bi₂Se₃, superconductivity with large shielding volume fraction (鈭?1.5% at 0.5 K) has been achieved in Sr_0.065Bi₂Se₃. Analysis of the Shubnikov鈥揹e Hass oscillations confirms the half-shift expected from a Dirac spectrum, giving transport evidence of the existence of surface states. Importantly, Sr_xBi₂Se₃superconductor is stable under air, making Sr_xBi₂Se₃ an ideal material base for investigating topological superconductivity.