Quantized Conductance of Majorana Zero Mode in the Vortex of the Topological Superconductor (Li0.84Fe0.16)OHFeSe

被引：72

作者：

Chen, C. ^{[1
,2
,3
]}

Liu, Q. ^{[1
,2
,3
,4
]}

Zhang, T. Z. ^{[1
,2
,3
]}

Li, D. ^{[5
]}

Shen, P. P. ^{[5
]}

Dong, X. L. ^{[5
]}

Zhao, Z-X ^{[5
]}

Zhang, T. ^{[1
,2
,3
]}

Feng, D. L. ^{[1
,2
,3
,6
,7
]}

机构：

[1] Fudan Univ, State Key Lab Surface Phys, Shanghai 2004332, Peoples R China

[2] Fudan Univ, Dept Phys, Shanghai 2004332, Peoples R China

[3] Collaborat Innovat Ctr Adv Microstruct, Nanjing 210093, Jiangsu, Peoples R China

[4] Sci & Technol Surface Phys & Chem Lab, Mianyang 621908, Peoples R China

[5] Chinese Acad Sci, Inst Phys, Natl Lab Superconduct, Beijing 100190, Peoples R China

[6] Univ Sci & Technol China, CAS Ctr Excellence Quantum Informat & Quantum Phy, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Anhui, Peoples R China

[7] Univ Sci & Technol China, Dept Phys, Hefei 230026, Anhui, Peoples R China

来源：

CHINESE PHYSICS LETTERS | 2019年 / 36卷 / 05期

基金：

中国国家自然科学基金; 国家重点研发计划;

关键词：

FERMIONS;

D O I：

10.1088/0256-307X/36/5/057403

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The Majorana zero mode (MZM), which manifests as an exotic neutral excitation in superconductors, is the building block of topological quantum computing. It has recently been found in the vortices of several iron-based superconductors as a zero-bias conductance peak in tunneling spectroscopy. In particular, a clean and robust MZM has been observed in the cores of free vortices in (Li0.84Fe0.16)OHFeSe. Here using scanning tunneling spectroscopy, we demonstrate that Majorana-induced resonant Andreev reflection occurs between the STM tip and this zero-bias bound state, and consequently, the conductance at zero bias is quantized as 2e(2)/h. Our results present a hallmark signature of the MZM in the vortex of an intrinsic topological superconductor, together with its intriguing behavior.

引用

页数：5

共 28 条

[1] New directions in the pursuit of Majorana fermions in solid state systems [J].

Alicea, Jason .

REPORTS ON PROGRESS IN PHYSICS, 2012, 75 (07)

[2] Topological Crystalline Insulators and Topological Superconductors: From Concepts to Materials [J].

Ando, Yoichi ;

Fu, Liang .

ANNUAL REVIEW OF CONDENSED MATTER PHYSICS, VOL 6, 2015, 6 :361-381

[3] Class D Spectral Peak in Majorana Quantum Wires [J].

Bagrets, Dmitry ;

Altland, Alexander .

PHYSICAL REVIEW LETTERS, 2012, 109 (22)

[4] Search for Majorana Fermions in Superconductors [J].

Beenakker, C. W. J. .

ANNUAL REVIEW OF CONDENSED MATTER PHYSICS, VOL 4, 2013, 4 :113-136

[5] Superconducting proximity effect and Majorana fermions at the surface of a topological insulator [J].

Fu, Liang ;

Kane, C. L. .

PHYSICAL REVIEW LETTERS, 2008, 100 (09)

[6] Superconducting (Li,Fe)OHFeSe Film of High Quality and High Critical Parameters [J].

Huang, Yulong ;

Feng, Zhongpei ;

Ni, Shunli ;

Li, Jun ;

Hu, Wei ;

Liu, Shaobo ;

Mao, Yiyuan ;

Zhou, Huaxue ;

Zhou, Fang ;

Jin, Kui ;

Wang, Huabing ;

Yuan, Jie ;

Dong, Xiaoli ;

Zhao, Zhongxian .

CHINESE PHYSICS LETTERS, 2017, 34 (07)

[7] Non-abelian statistics of half-quantum vortices in p-wave superconductors [J].

Ivanov, DA .

PHYSICAL REVIEW LETTERS, 2001, 86 (02) :268-271

[8] Evolution of Density of States and a Spin-Resolved Checkerboard-Type Pattern Associated with the Majorana Bound State [J].

Kawakami, Takuto ;

Hu, Xiao .

PHYSICAL REVIEW LETTERS, 2015, 115 (17)

[9] Near-zero-energy end states in topologically trivial spin-orbit coupled superconducting nanowires with a smooth confinement [J].

Kells, G. ;

Meidan, D. ;

Brouwer, P. W. .

PHYSICAL REVIEW B, 2012, 86 (10)

[10] Majorana Fermion Induced Resonant Andreev Reflection [J].

Law, K. T. ;

Lee, Patrick A. ;

Ng, T. K. .

PHYSICAL REVIEW LETTERS, 2009, 103 (23)

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