Specular Andreev reflection in thin films of topological insulators

Abstract

We theoretically reveal the possibility of specular Andreev reflection in a thin film topological insulator normal-superconductor (N/S) junction in the presence of a gate electric field. The probability of specular Andreev reflection increases with the electric field, and electron-hole conversion with unit efficiency happens in a wide experimentally accessible range of the electric field. We show that perfect specular Andreev reflection can occur for all angles of incidence with a particular excitation energy value. In addition, we find that the thermal conductance of the structure displays exponential dependence on the temperature. Our results reveal the potential of the proposed topological insulator thin-film-based N/S structure for the realization of intraband specular Andreev reflection.

10 pages, 9 figures. Some typos are corrected

References in corpus (6)

• Andreev reflection and Klein tunneling in graphene
• Superconducting Spintronics
• Specular Andreev reflection in graphene
• Spin-polarized tunneling current through a thin film of topological insulator in a parallel magnetic field
• Heat transport by Dirac fermions in normal/superconducting graphene junctions
• Unconventional proximity-induced superconductivity in bilayer systems

Cited by in corpus (10)

• Andreev reflection near the Dirac point at Graphene - NbSe2 junction
• Enhancement of crossed Andreev reflection in normal-superconductor-normal junction of thin topological insulator
• Spin-polarized Specular Andreev Reflections in Altermagnets
• Double Andreev reflections and double electron transmissions in a normal-superconductor-normal junction based on type-II Weyl semimetal
• Superconducting proximity effect in $d$-wave cuprate/ graphene heterostructures
• Specular Andreev reflection and its detection
• Superconductivity in Two-Dimensional Systems with Unconventional Rashba Bands
• Andreev reflection in 2D relativistic materials with realistic tunneling transparency in normal-metal-superconductor junctions
• Quasiparticle cooling using a Topological insulator-Superconductor hybrid junction
• Electrical and thermal transport in a twisted heterostructure of transition metal dichalcogenide and CrI${}_3$ connected to a superconductor