Journal
PHYSICAL REVIEW LETTERS
Volume 114, Issue 7, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.114.077001
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Funding
- Graphene Flagship
- Agence Nationale de la Recherche [ANR-11-BS04-0019, ANR-13-IS10-0003-01]
- Agence Nationale de la Recherche (ANR) [ANR-11-BS04-0019] Funding Source: Agence Nationale de la Recherche (ANR)
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In two-dimensional multivalley semiconductors, at low doping, even a moderate electron-electron interaction enhances the response to any perturbation inducing a valley polarization. If the valley polarization is due to the electron-phonon coupling, the electron-electron interaction results in an enhancement of the superconducting critical temperature. By performing first-principles calculations beyond density functional theory, we prove that this effect accounts for the unconventional doping dependence of the superconducting transition temperature (T-c) and of the magnetic susceptibility measured in LixZrNCI. Finally, we discuss what are the conditions for a maximal T-c enhancement in weakly doped two-dimensional semiconductors.
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