Joint ICTP/SISSA Condensed Matter Seminar, 31 January at 11:30am, Gian Marcello Andolina

[CMSP Seminars Secretariat]

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  Joint ICTP/SISSA Condensed Matter Seminar
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** * * Tuesday**, 31 January 2023, 11:30**am ***(CET)** * **
In person: *Luigi Stasi Seminar Room **(Leonardo Building, second floor)***
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/Zoom: 
/https://zoom.us/meeting/register/tJUpde2vqT8qGtdvL0yNjSrrNv3Hb-r4eY__<https://zoom.us/meeting/register/tJIsfuuhqjsrE9EZY2loNxNobg8Lf39NUVHJ>

Speaker: *Gian Marcello Andolina *(College de France)

Title: *Can deep sub-wavelength cavities induce Amperean 
superconductivity in a 2D material?

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Abstract:
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. In this talk, I 
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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CMSP, Condensed Matter & Statistical Physics Section
http://www.ictp.it/research/cmsp.aspx

The Abdus Salam International Centre for Theoretical Physics
https://www.ictp.it/

CMSP Seminars support:OnlineCMSP at ictp.it  
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