Feasible model for photoinduced interband pairing

S. Porta, L. Privitera, N. Traverso Ziani, M. Sassetti, F. Cavaliere, and B. Trauzettel
Phys. Rev. B 100, 024513 – Published 19 July 2019

Abstract

Recently, it has been proposed that a mechanism for the appearance of nonequilibrium superconductivity in a resonantly driven semiconductor with repulsive interband interactions exists [25]. The underlying microscopic model relies on the appearance of a specific fermionic dissipation mechanism and the careful simultaneous tailoring of the electronic dispersion relation and electron-electron interactions. We, instead, show that the phenomenon is rather general and does not need a special fine tuning of parameters. By considering a pair of bands with locally the same sign of concavity, we demonstrate that interband pairing arises under the natural assumption of the presence of phononic baths and radiative recombination. In light of these findings, we demonstrate how the emergence of superconductivity can be understood in terms of standard equilibrium interband BCS theory.

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  • Received 28 March 2019
  • Revised 3 July 2019

DOI:https://doi.org/10.1103/PhysRevB.100.024513

©2019 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

S. Porta1,2,*, L. Privitera3,*, N. Traverso Ziani1,2,3, M. Sassetti1,2, F. Cavaliere1,2, and B. Trauzettel3,4

  • 1Dipartimento di Fisica, Università di Genova, 16146 Genova, Italy
  • 2SPIN-CNR, 16146 Genova, Italy
  • 3Institute for Theoretical Physics and Astrophysics, University of Würzburg, 97074 Würzburg, Germany
  • 4Würzburg-Dresden Cluster of Excellence ct.qmat, Germany

  • *These authors contributed equally to this work.

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Issue

Vol. 100, Iss. 2 — 1 July 2019

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