Transport through Andreev bound states in a Weyl semimetal quantum dot

Abstract

We study transport through a Weyl semimetal quantum dot sandwiched between an $s$-wave superconductor and a normal lead. The conductance peaks at regular intervals and exhibits double periodicity with respect to two characteristic frequencies of the system, one that originates from Klein tunneling in the system and the other coming from the chiral nature of the excitations. Using a scattering matrix approach as well as a lattice simulation, we demonstrate the universal features of the conductance through the system and discuss the feasibility of observing them in experiments.

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• Josephson junctions of Weyl and multi-Weyl semimetals
• Fermi arc reconstruction at the interface of twisted Weyl semimetals
• Appearance of the universal value $e^2/h$ of the zero-bias conductance in a Weyl semimetal-superconductor junction
• Transport across junctions of a Weyl and a multi-Weyl semimetal
• Transport across junctions of pseudospin-one fermions
• Thermoelectric properties of inversion symmetry broken Weyl semimetal-Weyl superconductor hybrid junctions
• Zero-dimensional topologically nontrivial state in a superconducting quantum dot
• Theory of universal differential conductance of magnetic Weyl type -II junctions
• Signature of nodal topology in nonlinear quantum transport across junctions in Weyl and multi-Weyl semimetals
• Fabry-Perot interferometry in Weyl semi-metals