Topological Transition of Superconductivity in Dirac Semimetal Nanowire Josephson Junctions

Li, Cai-Zhen1,2,3,4; Wang, An-Qi3,4,5; Li, Chuan6; Zheng, Wen-Zhuang3,4; Brinkman, Alexander6; Yu, Da-Peng1,2; Liao, Zhi-Min3,4,7

2021-01-12

10.1103/PhysRevLett.126.027001

PHYSICAL REVIEW LETTERS   影响因子和分区

0031-9007

1079-7114

We report the topological transition by gate control in a Cd3As2 Dirac semimetal nanowire Josephson junction with diameter of about 64 nm. In the electron branch, the quantum confinement effect enforces the surface band into a series of gapped subbands and thus nontopological states. In the hole branch, however, because the hole mean free path is smaller than the nanowire perimeter, the quantum confinement effect is inoperative and the topological property maintained. The superconductivity is enhanced by gate tuning from electron to hole conduction, manifested by a larger critical supercurrent and a larger critical magnetic field, which is attributed to the topological transition from gapped surface subbands to a gapless surface band. The gate-controlled topological transition of superconductivity should be valuable for manipulation of Majorana zero modes, providing a platform for future compatible and scalable design of topological qubits.

SCI ; EI

英语

NI论文

第一

National Key Research and Development Program of China["2018YFA0703703","2016YFA0300802"] ; National Natural Science Foundation of China[91964201,61825401,11774004] ; Netherlands Organization for Scientific Research (NWO) through a VENI grant[680-47-463]

Physics

Physics, Multidisciplinary

WOS:000606970600014

AMER PHYSICAL SOC

20210509843146

Arsenic compounds ; Cadmium compounds ; Josephson junction devices ; Nanowires ; Quantum confinement

Nanotechnology:761 ; Combinatorial Mathematics, Includes Graph Theory, Set Theory:921.4 ; Solid State Physics:933

PHYSICS

Web of Science

1.Southern Univ Sci & Technol, Shenzhen Inst Quantum Sci & Engn, Shenzhen 518055, Peoples R China
2.Southern Univ Sci & Technol, Dept Phys, Shenzhen 518055, Peoples R China
3.Peking Univ, Sch Phys, State Key Lab Mesoscop Phys, Beijing 100871, Peoples R China
4.Peking Univ, Sch Phys, Frontiers Sci Ctr Nanooptoelect, Beijing 100871, Peoples R China
5.Peking Univ, Acad Adv Interdisciplinary Studies, Beijing 100871, Peoples R China
6.Univ Twente, MESA Inst Nanotechnol, NL-7500 AE Enschede, Netherlands
7.Peking Univ, Beijing Key Lab Quantum Devices, Beijing 100871, Peoples R China

Li, Cai-Zhen,Wang, An-Qi,Li, Chuan,et al. Topological Transition of Superconductivity in Dirac Semimetal Nanowire Josephson Junctions[J]. PHYSICAL REVIEW LETTERS,2021,126(2).

Li, Cai-Zhen.,Wang, An-Qi.,Li, Chuan.,Zheng, Wen-Zhuang.,Brinkman, Alexander.,...&Liao, Zhi-Min.(2021).Topological Transition of Superconductivity in Dirac Semimetal Nanowire Josephson Junctions.PHYSICAL REVIEW LETTERS,126(2).

Li, Cai-Zhen,et al."Topological Transition of Superconductivity in Dirac Semimetal Nanowire Josephson Junctions".PHYSICAL REVIEW LETTERS 126.2(2021).