Magnetic field enhanced zero-bias conductance in vertical Josephson junctions based on Weyl semimetals

Lin, Zhu1,2,3,4; Song, Hua-Ding1,2; Ye, Xing-Guo1,2; Xue, Jianhong5; Wang, An-Qi1,2; Zhang, Yan1,2; Liu, Song3,4; Zhang, Zhensheng3,4; Xu, Hongqi5; Yu, Dapeng3,4; Liao, Zhi-Min1,2,5,6

2020-06-22

10.1103/PhysRevB.101.214519

PHYSICAL REVIEW B   影响因子和分区

2469-9950

2469-9969

We report the magnetotransport properties of T-d-MoTe2 based vertical junctions with NbN superconducting electrodes. Benefiting from the high critical magnetic field of NbN, the superconducting state is maintained up to 8 T. A sharp drop of resistance is observed at T-c similar to 13 K, corresponding to the critical temperature of NbN electrodes. The differential conductance spectra show that the zero-bias conductance is increased by magnetic fields with 41.6% increment at 14 T. Intriguingly, negative magnetoresistance (MR) similar to-48% is observed under 8 T at 3 K. The negative MR disappears above superconductivity critical temperature similar to 13 K. The Weyl semimetal MoTe2 combined with superconductor is promising for searching topological superconductivity and Majorana zero modes.

SCI ; EI

英语

其他

National Key Research and Development Program of China[2018YFA0703703][2016YFA0300802] ; National Natural Science Foundation of China[91964201][61825401][11774004]

Materials Science ; Physics

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

WOS:000541697700007

AMER PHYSICAL SOC

20204109333699

Magnetic fields ; Tellurium compounds ; Electrodes ; Temperature

Thermodynamics:641.1 ; Magnetism: Basic Concepts and Phenomena:701.2

PHYSICS

Web of Science

1.Peking Univ, Sch Phys, State Key Lab Mesoscop Phys, Beijing 100871, Peoples R China
2.Peking Univ, Sch Phys, Frontiers Sci Ctr Nanooptoelect, Beijing 100871, Peoples R China
3.Southern Univ Sci & Technol, Inst Quantum Sci & Engn, Shenzhen 518055, Peoples R China
4.Southern Univ Sci & Technol, Dept Phys, Shenzhen 518055, Peoples R China
5.Peking Univ, Beijing Key Lab Quantum Devices, Beijing 100871, Peoples R China
6.Peking Univ, Collaborat Innovat Ctr Quantum Matter, Beijing 100871, Peoples R China

Lin, Zhu,Song, Hua-Ding,Ye, Xing-Guo,et al. Magnetic field enhanced zero-bias conductance in vertical Josephson junctions based on Weyl semimetals[J]. PHYSICAL REVIEW B,2020,101(21).

Lin, Zhu.,Song, Hua-Ding.,Ye, Xing-Guo.,Xue, Jianhong.,Wang, An-Qi.,...&Liao, Zhi-Min.(2020).Magnetic field enhanced zero-bias conductance in vertical Josephson junctions based on Weyl semimetals.PHYSICAL REVIEW B,101(21).

Lin, Zhu,et al."Magnetic field enhanced zero-bias conductance in vertical Josephson junctions based on Weyl semimetals".PHYSICAL REVIEW B 101.21(2020).