Light-induced topological superconductivity in transition metal dichalcogenide monolayers

Julku，Aleksi1; Kinnunen，Jami J.2; Camacho-Guardian，Arturo3; Bruun，Georg M.1,4

2022-10-01

10.1103/PhysRevB.106.134510

Physical Review B   Impact Factor & Quartile

2469-9950

2469-9969

Monolayer transition metal dichalcogenides (TMDs) host deeply bound excitons interacting with itinerant electrons, and as such they represent an exciting new quantum many-body Bose-Fermi mixture. Here, we demonstrate that electrons interacting with a Bose-Einstein condensate (BEC) of exciton-polaritons can realize a two-dimensional topological px+ipy superconductor. Using strong coupling Eliashberg theory, we show that this is caused by an attractive interaction mediated by the BEC, which overcompensates the repulsive Coulomb interaction between the electrons. The hybrid light-matter nature of the BEC is crucial for achieving this, since it can be used to reduce retardation effects and increase the mediated interaction in regimes important for pairing. We finally show how the great flexibility of TMDs allows one to tune the critical temperature of the topological superconducting phase to be within experimental reach.

SCI

English

NI Journal Papers

Others

Materials Science ; Physics

Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter

WOS:000918198800004

AMER PHYSICAL SOC

PHYSICS

2-s2.0-85140715725

Scopus

1.Center for Complex Quantum Systems,Department of Physics and Astronomy,Aarhus University,Aarhus C,Ny Munkegade,DK-8000,Denmark
2.Department of Applied Physics,Aalto University,Aalto,P.O.Box 15100,00076,Finland
3.Departamento de Física Química,Instituto de Física,Universidad Nacional Autónoma de México,Ciudad de México,Apartado Postal 20-364,C.P. 01000,Mexico
4.Shenzhen Institute for Quantum Science and Engineering,Department of Physics,Southern University of Science and Technology,Shenzhen,518055,China

Julku，Aleksi,Kinnunen，Jami J.,Camacho-Guardian，Arturo,et al. Light-induced topological superconductivity in transition metal dichalcogenide monolayers[J]. Physical Review B,2022,106(13).

Julku，Aleksi,Kinnunen，Jami J.,Camacho-Guardian，Arturo,&Bruun，Georg M..(2022).Light-induced topological superconductivity in transition metal dichalcogenide monolayers.Physical Review B,106(13).

Julku，Aleksi,et al."Light-induced topological superconductivity in transition metal dichalcogenide monolayers".Physical Review B 106.13(2022).