Electrically Controlled Crossed Andreev Reflection in Two-Dimensional Antiferromagnets

Martin F. Jakobsen; Arne Brataas; Alireza Qaiumzadeh

doi:10.1103/PhysRevLett.127.017701

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Electrically Controlled Crossed Andreev Reflection in Two-Dimensional Antiferromagnets

Martin F. Jakobsen, Arne Brataas, Alireza Qaiumzadeh

DOI 10.1103/PhysRevLett.127.017701 · Physical Review Letters

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Abstract

We report generic and tunable crossed Andreev reflection (CAR) in a superconductor sandwiched between two antiferromagnetic layers. We consider recent examples of two-dimensional magnets with hexagonal lattices, where gate voltages control the carrier type and density, and predict a robust signature of perfect CAR in the nonlocal differential conductance with one electron-doped and one hole-doped antiferromagnetic lead. The magnetic field-free and spin-degenerate CAR signal is electrically controlled and visible over a large voltage range, showing promise for solid-state quantum entanglement applications.