Bulk effect and scaling behavior of Majorana Bound States in FeTe<sub>0.55</sub>Se<sub>0.45</sub>

Bulletin of the American Physical Society

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APS March Meeting 2018

Volume 63, Number 1

Monday–Friday, March 5–9, 2018; Los Angeles, California

Session F13: High Tc superconductor based topological superconductivity

11:15 AM–2:15 PM, Tuesday, March 6, 2018
LACC Room: 304A

Sponsoring Unit: DMP
Chair: Vic Law, Hong Kong University of Science and Technology

Abstract ID: BAPS.2018.MAR.F13.6

Abstract: F13.00006 : Bulk effect and scaling behavior of Majorana Bound States in FeTe_0.55Se_0.45

12:39 PM–12:51 PM

Abstract

Presenter:

Lingyuan Kong
(Institute of Physics, Chinese Academy of Sciences)

Authors:

Lingyuan Kong
(Institute of Physics, Chinese Academy of Sciences)

Dongfei Wang
(Institute of Physics, Chinese Academy of Sciences)

Shiyu Zhu
(Institute of Physics, Chinese Academy of Sciences)

Peng Fan
(Institute of Physics, Chinese Academy of Sciences)

Hui Chen
(Institute of Physics, Chinese Academy of Sciences)

Wenyao Liu
(Institute of Physics, Chinese Academy of Sciences)

Lu Cao
(Institute of Physics, Chinese Academy of Sciences)

Yujie Sun
(Institute of Physics, Chinese Academy of Sciences)

Shixuan Du
(Institute of Physics, Chinese Academy of Sciences)

Hong Ding
(Institute of Physics, Chinese Academy of Sciences)

H.-J. Gao
(Institute of Physics, Chinese Academy of Sciences)

John Schneeloch
(Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory)

Ruidan Zhong
(Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory)

Genda Gu
(Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory)

Liang Fu
(Department of Physics, Massachusetts Institute of Technology)

Majorana bound states (MBS) can arise as quasi-particle excitations in vortex core of p-wave superconductors. Inspired by heterostructure proximity effect, Fu and Kane [1] proposed a realistic way to construct effective p-wave conditions with ordinary superconductor, which needs to induce full superconducting gap on non-degenerate Dirac surface states. Recently, we found a new platform (FeTe_0.55Se_0.45 single crystal) supporting pure Majorana-type excitations mimic Fu-Kane Model, which benefit from interband k-space proximity effect and strong correlation of materials. By combining ARPES [2] and STM [3] measurements, we, previously, established topological non-trivial properties and shown strong evidences of existence of MBS on vortex cores. In this talk, we will report temperature and tunneling barrier dependent measurements of MBS in FeTe_0.55Se_0.45, whose behaviors support Mojorana explanations. [1] L. Fu and C. L. Kane, Phys. Rev. Lett. 100, 096407 (2008) [2] P. Zhang et al., arXiv:1706.05163 (2017) [3] D.-F. Wang^*, L.-Y. Kong^*, P. Fan^* et al., arXiv:1706.06074 (2017)

To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2018.MAR.F13.6

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Bulletin of the American Physical Society

APS March Meeting 2018

Volume 63, Number 1

Monday–Friday, March 5–9, 2018; Los Angeles, California

Session F13: High Tc superconductor based topological superconductivity

Abstract: F13.00006 : Bulk effect and scaling behavior of Majorana Bound States in FeTe0.55Se0.45

Presenter:

Authors:

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Abstract: F13.00006 : Bulk effect and scaling behavior of Majorana Bound States in FeTe_0.55Se_0.45