Chiral anomaly induced oscillations in the Josephson current in Weyl semimetals

Uddin, Salah2; Duan, Wenye3; Wang, Jun4; Ma, Zhongshui3,5; Liu, Jun-Feng1,2

2019-01-17

10.1103/PhysRevB.99.045426

PHYSICAL REVIEW B   影响因子和分区

2469-9950

2469-9969

Weyl semimetals are a three-dimensional topological phase of matter with linearly dispersed Weyl points which appear in pairs and carry opposite chirality. The separation of paired Weyl points allows charge transfer between them in the presence of parallel electric and magnetic fields, which is known as the chiral anomaly. In this paper, we theoretically study the influence of the chiral anomaly induced chiral charge imbalance on the Josephson current in a Weyl superconductor-Weyl semimetal-Weyl superconductor junction. In Weyl superconductors, two types of pairings are considered, namely, zero momentum BCS-like pairing and finite momentum Fulde-Ferrell-Larkin-Ovchinnikov (FFLO)-like pairing. For BCS-like pairing, we find that the Josephson current exhibits 0-pi transitions and oscillates as a function of lambda L-0, where lambda(0) is the chirality imbalance induced by parallel electric and magnetic fields and L is the length of the Weyl semimetal. The amplitude of the Josephson current also depends on the angle beta between the line connecting two paired Weyl points and the transport direction along the junction. For FFLO-like pairing, chirality imbalance induced periodic oscillations are absent and the Josephson current is also independent of the angle beta. These findings are useful in detecting the chiral anomaly and distinguishing the superconducting pairing mechanism of Weyl semimetals.

SCI ; EI

英语

第一 ; 通讯

National Natural Science Foundation of China (NSFC)[11774144] ; National Natural Science Foundation of China (NSFC)[11574045]

Materials Science ; Physics

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

WOS:000456032500008

AMER PHYSICAL SOC

20191906878699

Charge transfer ; Chirality ; Magnetic fields ; Superconducting materials

Magnetism: Basic Concepts and Phenomena:701.2 ; Superconducting Materials:708.3 ; Chemical Reactions:802.2 ; Atomic and Molecular Physics:931.3

PHYSICS

Web of Science

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

Uddin, Salah,Duan, Wenye,Wang, Jun,et al. Chiral anomaly induced oscillations in the Josephson current in Weyl semimetals[J]. PHYSICAL REVIEW B,2019,99(4).

Uddin, Salah,Duan, Wenye,Wang, Jun,Ma, Zhongshui,&Liu, Jun-Feng.(2019).Chiral anomaly induced oscillations in the Josephson current in Weyl semimetals.PHYSICAL REVIEW B,99(4).

Uddin, Salah,et al."Chiral anomaly induced oscillations in the Josephson current in Weyl semimetals".PHYSICAL REVIEW B 99.4(2019).