Quantized Majorana pump in semiconductor-superconductor heterostructures

Tan, Hui1; Fu, Pei-Hao2; Chen, Yan-Ru2; Liu, Jun-Feng1; Wang, Jun3; Ma, Zhongshui4,5

2021-05-06

10.1103/PhysRevB.103.195407

PHYSICAL REVIEW B   影响因子和分区

2469-9950

2469-9969

We propose a quantized Majorana pump (QMP) in semiconductor-superconductor heterostructures. The pump consists of a Majorana nanowire, i.e., a Rashba wire in proximity to an s-wave superconductor and in a magnetic field, and two ferromagnetic leads. When the orientation of the magnetic field is rotated by 2 pi, an elementary charge e is transferred between two leads. The number of the pumped charge in a cycle is related to the winding number of the Andreev reflection amplitude. In the topologically trivial phase without Majorana zero mode (MZM), the pumped charge decreases rapidly to zero. More importantly, the pump works at zero bias and provides a more effective way to distinguish MZMs from trivial partially separated Andreev bound states. Therefore, this QMP provides not only a smoking-gun signature of MZMs, but also an ideal platform to realize topological single-electron pumps with the potential for realizing novel current standards in electrical metrology.

SCI ; EI

英语

其他

National Natural Science Foundation of China (NSFC)[11774144,11774006,11874221] ; NBRP of China[2012CB921300]

Materials Science ; Physics

Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter

WOS:000655877000006

AMER PHYSICAL SOC

20212110406367

Electric windings ; Magnetic fields ; Shear waves ; Superconducting materials ; Topology

Magnetism: Basic Concepts and Phenomena:701.2 ; Superconducting Materials:708.3 ; Semiconductor Devices and Integrated Circuits:714.2 ; Combinatorial Mathematics, Includes Graph Theory, Set Theory:921.4 ; Mechanics:931.1

PHYSICS

Web of Science

1.Guangzhou Univ, Sch Phys & Mat Sci, Guangzhou 510006, Peoples R China
2.Southern Univ Sci & Technol, Dept Phys, Shenzhen 518055, Peoples R China
3.Southeast Univ, Dept Phys, Nanjing 210096, Peoples R China
4.Peking Univ, Sch Phys, Beijing 100871, Peoples R China
5.Collaborat Innovat Ctr Quantum Matter, Beijing 100871, Peoples R China

Tan, Hui,Fu, Pei-Hao,Chen, Yan-Ru,et al. Quantized Majorana pump in semiconductor-superconductor heterostructures[J]. PHYSICAL REVIEW B,2021,103(19).

Tan, Hui,Fu, Pei-Hao,Chen, Yan-Ru,Liu, Jun-Feng,Wang, Jun,&Ma, Zhongshui.(2021).Quantized Majorana pump in semiconductor-superconductor heterostructures.PHYSICAL REVIEW B,103(19).

Tan, Hui,et al."Quantized Majorana pump in semiconductor-superconductor heterostructures".PHYSICAL REVIEW B 103.19(2021).