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Phys Rev Lett. 2017 Sep 15;119(11):116802. doi: 10.1103/PhysRevLett.119.116802. Epub 2017 Sep 12.

Quantum Criticality in Resonant Andreev Conduction.

Author information

1
School of Physics, Georgia Institute of Technology, Atlanta, Georgia 30332, USA.
2
Department of Physics, Yale University, New Haven, Connecticut 06520, USA.
3
Station Q, Microsoft Research, Santa Barbara, California 93106-6105, USA.

Abstract

Motivated by recent experiments with proximitized nanowires, we study a mesoscopic s-wave superconductor connected via point contacts to normal-state leads. We demonstrate that at energies below the charging energy the system is described by the two-channel Kondo model, which can be brought to the quantum critical regime by varying the gate potential and conductances of the contacts.

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