Detection of Majorana fermions in an Aharonov-Bohm interferometer

doi:10.1088/1674-1056/23/5/057201

中国物理B ›› 2014, Vol. 23 ›› Issue (5): 57201-057201.doi: 10.1088/1674-1056/23/5/057201

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇下一篇

Detection of Majorana fermions in an Aharonov-Bohm interferometer

尚恩明, 潘义明, 邵陆兵, 王伯根

National Laboratory of Solid State Microstructures and School of Physics, Nanjing University, Nanjing 210093, China

收稿日期:2013-08-17 修回日期:2013-10-21 出版日期:2014-05-15 发布日期:2014-05-15
基金资助:
Project supported by the National Basic Research Program of China (Grant No. 2011CB922103).

Detection of Majorana fermions in an Aharonov-Bohm interferometer

Shang En-Ming (尚恩明), Pan Yi-Ming (潘义明), Shao Lu-Bing (邵陆兵), Wang Bai-Gen (王伯根)

National Laboratory of Solid State Microstructures and School of Physics, Nanjing University, Nanjing 210093, China

Received:2013-08-17 Revised:2013-10-21 Online:2014-05-15 Published:2014-05-15
Contact: Shang En-Ming E-mail:shangjin0491@163.com
About author:72.10.Fk; 73.63.-b; 85.75.-d
Supported by:
Project supported by the National Basic Research Program of China (Grant No. 2011CB922103).

摘要/Abstract

摘要： By using the non-equilibrium Green's function technique, we investigate the electronic transport properties in an Aharonov-Bohm interferometer coupling with Majorana fermions. We find a fixed unit conductance peak which is independent of the other factors when the topological superconductor is grounded. Especially, an additional phase appears when the topological superconductor is in the strong Coulomb regime, which induces a new conductance resonant peak compared with the structure of replacing the topological superconductor by a quantum dot, and the conductance oscillation with the magnetic flux reveals a 2π phase shift by raising (lowering) a charge on the capacitor.

关键词: Majorana fermion, quantum dot, Aharonov-Bohm interferometer, Coulomb blockade

Abstract: By using the non-equilibrium Green's function technique, we investigate the electronic transport properties in an Aharonov-Bohm interferometer coupling with Majorana fermions. We find a fixed unit conductance peak which is independent of the other factors when the topological superconductor is grounded. Especially, an additional phase appears when the topological superconductor is in the strong Coulomb regime, which induces a new conductance resonant peak compared with the structure of replacing the topological superconductor by a quantum dot, and the conductance oscillation with the magnetic flux reveals a 2π phase shift by raising (lowering) a charge on the capacitor.

Key words: Majorana fermion, quantum dot, Aharonov-Bohm interferometer, Coulomb blockade

中图分类号: (Scattering by point defects, dislocations, surfaces, and other imperfections (including Kondo effect))

72.10.Fk

73.63.-b (Electronic transport in nanoscale materials and structures) 85.75.-d (Magnetoelectronics; spintronics: devices exploiting spin polarized transport or integrated magnetic fields)

尚恩明, 潘义明, 邵陆兵, 王伯根. Detection of Majorana fermions in an Aharonov-Bohm interferometer[J]. 中国物理B, 2014, 23(5): 57201-057201.

Shang En-Ming (尚恩明), Pan Yi-Ming (潘义明), Shao Lu-Bing (邵陆兵), Wang Bai-Gen (王伯根). Detection of Majorana fermions in an Aharonov-Bohm interferometer[J]. Chin. Phys. B, 2014, 23(5): 57201-057201.

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Detection of Majorana fermions in an Aharonov-Bohm interferometer

Detection of Majorana fermions in an Aharonov-Bohm interferometer

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