0−π transitions in a Josephson junction of an irradiated Weyl semimetal

Udit Khanna; Sumathi Rao; Arijit Kundu

doi:10.1103/PhysRevB.95.201115

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0−π transitions in a Josephson junction of an irradiated Weyl semimetal

Udit Khanna, Sumathi Rao, Arijit Kundu

DOI 10.1103/PhysRevB.95.201115 · Physical Review B

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Abstract

We propose a setup for the experimental realization of anisotropic 0−π transitions of the Josephson current, in a junction whose link is made of irradiated Weyl semimetal (WSM), due to the presence of chiral nodes. The Josephson current through a time-reversal symmetric WSM has anisotropic (with respect to the orientation of the chiral nodes) periodic oscillations as a function of k0L, where k0 is the (relevant) separation of the chiral nodes and L is the length of the sample. We then show that the effective value of k0 can be tuned with precision by irradiating the sample with linearly polarized light, which does not break time-reversal invariance, resulting in 0−π transitions of the critical current. We also discuss the feasibility and robustness of our setup.