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Statut |
Confirmé |
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Série |
TQM |
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Domaines |
cond-mat |
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Date |
Mercredi 12 Avril 2023 |
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Heure |
14:00 |
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Institut |
LPTHE |
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Salle |
LPTHE library, towers 13-14, 4th floor |
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Nom de l'orateur |
Andolina |
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Prenom de l'orateur |
Marcello |
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Addresse email de l'orateur |
gian-marcello [dot] andolina [at] college-de-france [dot] fr |
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Institution de l'orateur |
JEIP, CNRS - Collège de France |
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Titre |
Can deep sub-wavelength cavities induce Amperean superconductivity in a 2D material? |
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Résumé |
Amperean superconductivity is an exotic phenomenon stemming from attractive effective electron-
electron interactions (EEEIs) mediated by a transverse gauge field. Originally introduced in the context of
quantum spin liquids and high-Tc superconductors, Amperean superconductivity has been recently
proposed to occur at temperatures on the order of 1-20 K in two-dimensional, parabolic-band, electron
gases embedded inside deep sub-wavelength optical cavities.
I will first generalize the microscopic theory of cavity-induced Amperean superconductivity to the case of
graphene and then argue that this superconducting state cannot be achieved in the deep sub-wavelength
regime. In the latter regime, indeed, a cavity induces only EEEIs between density fluctuations rather than
the current-current interactions which are responsible for Amperean pairing. |
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Numéro de preprint arXiv |
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Commentaires |
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Fichiers attachés |
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