Light-induced topological superconductivity in transition metal dichalcogenide monolayers
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-polarit...
Published in: | Physical Review B |
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2022
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Online Access: | https://pure.au.dk/portal/en/publications/4e4b81fb-098f-4810-b639-e4140b13cc12 https://doi.org/10.1103/PhysRevB.106.134510 http://www.scopus.com/inward/record.url?scp=85140715725&partnerID=8YFLogxK https://arxiv.org/pdf/2204.12229.pdf |
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ftuniaarhuspubl:oai:pure.atira.dk:publications/4e4b81fb-098f-4810-b639-e4140b13cc12 2024-05-19T07:43:11+00:00 Light-induced topological superconductivity in transition metal dichalcogenide monolayers Julku, Aleksi Kinnunen, Jami J. Camacho-Guardian, Arturo Bruun, Georg M. 2022-10 https://pure.au.dk/portal/en/publications/4e4b81fb-098f-4810-b639-e4140b13cc12 https://doi.org/10.1103/PhysRevB.106.134510 http://www.scopus.com/inward/record.url?scp=85140715725&partnerID=8YFLogxK https://arxiv.org/pdf/2204.12229.pdf eng eng https://pure.au.dk/portal/en/publications/4e4b81fb-098f-4810-b639-e4140b13cc12 info:eu-repo/semantics/openAccess Julku , A , Kinnunen , J J , Camacho-Guardian , A & Bruun , G M 2022 , ' Light-induced topological superconductivity in transition metal dichalcogenide monolayers ' , Physical Review B , vol. 106 , no. 13 , 134510 . https://doi.org/10.1103/PhysRevB.106.134510 article 2022 ftuniaarhuspubl https://doi.org/10.1103/PhysRevB.106.134510 2024-04-24T23:46:28Z 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. Article in Journal/Newspaper IPY Aarhus University: Research Physical Review B 106 13 |
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Open Polar |
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Aarhus University: Research |
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ftuniaarhuspubl |
language |
English |
description |
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. |
format |
Article in Journal/Newspaper |
author |
Julku, Aleksi Kinnunen, Jami J. Camacho-Guardian, Arturo Bruun, Georg M. |
spellingShingle |
Julku, Aleksi Kinnunen, Jami J. Camacho-Guardian, Arturo Bruun, Georg M. Light-induced topological superconductivity in transition metal dichalcogenide monolayers |
author_facet |
Julku, Aleksi Kinnunen, Jami J. Camacho-Guardian, Arturo Bruun, Georg M. |
author_sort |
Julku, Aleksi |
title |
Light-induced topological superconductivity in transition metal dichalcogenide monolayers |
title_short |
Light-induced topological superconductivity in transition metal dichalcogenide monolayers |
title_full |
Light-induced topological superconductivity in transition metal dichalcogenide monolayers |
title_fullStr |
Light-induced topological superconductivity in transition metal dichalcogenide monolayers |
title_full_unstemmed |
Light-induced topological superconductivity in transition metal dichalcogenide monolayers |
title_sort |
light-induced topological superconductivity in transition metal dichalcogenide monolayers |
publishDate |
2022 |
url |
https://pure.au.dk/portal/en/publications/4e4b81fb-098f-4810-b639-e4140b13cc12 https://doi.org/10.1103/PhysRevB.106.134510 http://www.scopus.com/inward/record.url?scp=85140715725&partnerID=8YFLogxK https://arxiv.org/pdf/2204.12229.pdf |
genre |
IPY |
genre_facet |
IPY |
op_source |
Julku , A , Kinnunen , J J , Camacho-Guardian , A & Bruun , G M 2022 , ' Light-induced topological superconductivity in transition metal dichalcogenide monolayers ' , Physical Review B , vol. 106 , no. 13 , 134510 . https://doi.org/10.1103/PhysRevB.106.134510 |
op_relation |
https://pure.au.dk/portal/en/publications/4e4b81fb-098f-4810-b639-e4140b13cc12 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1103/PhysRevB.106.134510 |
container_title |
Physical Review B |
container_volume |
106 |
container_issue |
13 |
_version_ |
1799482892259164160 |