Yanliang Hou

Affiliation

ICE group in the university of twente

Title of work

Quantum transport in Dirac semimetal-based Josephson junctions

Authors

Y.L. Hou$^1$, Z. Wu$^1$, C.I. Goksal$^1$, A.Q. Wang$^2$, Z.M. Liao$^2$, C. Li$^1$

$^1$ MESA+ Institute for Nanotechnology, University of Twente, Enschede 7500 AE, The Netherlands

$^2$ State Key Laboratory for Mesoscopic Physics and Frontiers Science Center for Nano-optoelectronics, School of Physics, Peking University, Beijing 100871, China

Abstract

Topological Dirac semimetals have recently gained significant attention, since they possess exotic quantum states, particularly surface Fermi arc states. Here, we perform Dirac semimetal nanoflakes and nanowires-based Josephson junctions as a platform for searching Fermi-arc superconductivity. Then, we carry out experimental measurements related to finite-momentum Cooper pairing, in-plane orbital effect and 4π supercurrent-based ac Josephson effect. We have observed a large asymmetry in critical supercurrent, called superconducting diode effect caused by finite-momentum Cooper pairing. And we also have observed that the Ic exhibits oscillations with a parallel magnetic field, caused by in-plane orbital effect of surface states.