Cargando…

Interactions between Fermi polarons in monolayer WS(2)

Interactions between quasiparticles are of fundamental importance and ultimately determine the macroscopic properties of quantum matter. A famous example is the phenomenon of superconductivity, which arises from attractive electron-electron interactions that are mediated by phonons or even other mor...

Descripción completa

Detalles Bibliográficos
Autores principales: Muir, Jack B., Levinsen, Jesper, Earl, Stuart K., Conway, Mitchell A., Cole, Jared H., Wurdack, Matthias, Mishra, Rishabh, Ing, David J., Estrecho, Eliezer, Lu, Yuerui, Efimkin, Dmitry K., Tollerud, Jonathan O., Ostrovskaya, Elena A., Parish, Meera M., Davis, Jeffrey A.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9579159/
https://www.ncbi.nlm.nih.gov/pubmed/36257945
http://dx.doi.org/10.1038/s41467-022-33811-x
_version_ 1784812125979410432
author Muir, Jack B.
Levinsen, Jesper
Earl, Stuart K.
Conway, Mitchell A.
Cole, Jared H.
Wurdack, Matthias
Mishra, Rishabh
Ing, David J.
Estrecho, Eliezer
Lu, Yuerui
Efimkin, Dmitry K.
Tollerud, Jonathan O.
Ostrovskaya, Elena A.
Parish, Meera M.
Davis, Jeffrey A.
author_facet Muir, Jack B.
Levinsen, Jesper
Earl, Stuart K.
Conway, Mitchell A.
Cole, Jared H.
Wurdack, Matthias
Mishra, Rishabh
Ing, David J.
Estrecho, Eliezer
Lu, Yuerui
Efimkin, Dmitry K.
Tollerud, Jonathan O.
Ostrovskaya, Elena A.
Parish, Meera M.
Davis, Jeffrey A.
author_sort Muir, Jack B.
collection PubMed
description Interactions between quasiparticles are of fundamental importance and ultimately determine the macroscopic properties of quantum matter. A famous example is the phenomenon of superconductivity, which arises from attractive electron-electron interactions that are mediated by phonons or even other more exotic fluctuations in the material. Here we introduce mobile exciton impurities into a two-dimensional electron gas and investigate the interactions between the resulting Fermi polaron quasiparticles. We employ multi-dimensional coherent spectroscopy on monolayer WS(2), which provides an ideal platform for determining the nature of polaron-polaron interactions due to the underlying trion fine structure and the valley specific optical selection rules. At low electron doping densities, we find that the dominant interactions are between polaron states that are dressed by the same Fermi sea. In the absence of bound polaron pairs (bipolarons), we show using a minimal microscopic model that these interactions originate from a phase-space filling effect, where excitons compete for the same electrons. We furthermore reveal the existence of a bipolaron bound state with remarkably large binding energy, involving excitons in different valleys cooperatively bound to the same electron. Our work lays the foundation for probing and understanding strong electron correlation effects in two-dimensional layered structures such as moiré superlattices.
format Online
Article
Text
id pubmed-9579159
institution National Center for Biotechnology Information
language English
publishDate 2022
publisher Nature Publishing Group UK
record_format MEDLINE/PubMed
spelling pubmed-95791592022-10-20 Interactions between Fermi polarons in monolayer WS(2) Muir, Jack B. Levinsen, Jesper Earl, Stuart K. Conway, Mitchell A. Cole, Jared H. Wurdack, Matthias Mishra, Rishabh Ing, David J. Estrecho, Eliezer Lu, Yuerui Efimkin, Dmitry K. Tollerud, Jonathan O. Ostrovskaya, Elena A. Parish, Meera M. Davis, Jeffrey A. Nat Commun Article Interactions between quasiparticles are of fundamental importance and ultimately determine the macroscopic properties of quantum matter. A famous example is the phenomenon of superconductivity, which arises from attractive electron-electron interactions that are mediated by phonons or even other more exotic fluctuations in the material. Here we introduce mobile exciton impurities into a two-dimensional electron gas and investigate the interactions between the resulting Fermi polaron quasiparticles. We employ multi-dimensional coherent spectroscopy on monolayer WS(2), which provides an ideal platform for determining the nature of polaron-polaron interactions due to the underlying trion fine structure and the valley specific optical selection rules. At low electron doping densities, we find that the dominant interactions are between polaron states that are dressed by the same Fermi sea. In the absence of bound polaron pairs (bipolarons), we show using a minimal microscopic model that these interactions originate from a phase-space filling effect, where excitons compete for the same electrons. We furthermore reveal the existence of a bipolaron bound state with remarkably large binding energy, involving excitons in different valleys cooperatively bound to the same electron. Our work lays the foundation for probing and understanding strong electron correlation effects in two-dimensional layered structures such as moiré superlattices. Nature Publishing Group UK 2022-10-18 /pmc/articles/PMC9579159/ /pubmed/36257945 http://dx.doi.org/10.1038/s41467-022-33811-x Text en © The Author(s) 2022 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) .
spellingShingle Article
Muir, Jack B.
Levinsen, Jesper
Earl, Stuart K.
Conway, Mitchell A.
Cole, Jared H.
Wurdack, Matthias
Mishra, Rishabh
Ing, David J.
Estrecho, Eliezer
Lu, Yuerui
Efimkin, Dmitry K.
Tollerud, Jonathan O.
Ostrovskaya, Elena A.
Parish, Meera M.
Davis, Jeffrey A.
Interactions between Fermi polarons in monolayer WS(2)
title Interactions between Fermi polarons in monolayer WS(2)
title_full Interactions between Fermi polarons in monolayer WS(2)
title_fullStr Interactions between Fermi polarons in monolayer WS(2)
title_full_unstemmed Interactions between Fermi polarons in monolayer WS(2)
title_short Interactions between Fermi polarons in monolayer WS(2)
title_sort interactions between fermi polarons in monolayer ws(2)
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9579159/
https://www.ncbi.nlm.nih.gov/pubmed/36257945
http://dx.doi.org/10.1038/s41467-022-33811-x
work_keys_str_mv AT muirjackb interactionsbetweenfermipolaronsinmonolayerws2
AT levinsenjesper interactionsbetweenfermipolaronsinmonolayerws2
AT earlstuartk interactionsbetweenfermipolaronsinmonolayerws2
AT conwaymitchella interactionsbetweenfermipolaronsinmonolayerws2
AT colejaredh interactionsbetweenfermipolaronsinmonolayerws2
AT wurdackmatthias interactionsbetweenfermipolaronsinmonolayerws2
AT mishrarishabh interactionsbetweenfermipolaronsinmonolayerws2
AT ingdavidj interactionsbetweenfermipolaronsinmonolayerws2
AT estrechoeliezer interactionsbetweenfermipolaronsinmonolayerws2
AT luyuerui interactionsbetweenfermipolaronsinmonolayerws2
AT efimkindmitryk interactionsbetweenfermipolaronsinmonolayerws2
AT tollerudjonathano interactionsbetweenfermipolaronsinmonolayerws2
AT ostrovskayaelenaa interactionsbetweenfermipolaronsinmonolayerws2
AT parishmeeram interactionsbetweenfermipolaronsinmonolayerws2
AT davisjeffreya interactionsbetweenfermipolaronsinmonolayerws2