We calculate the one-particle spectral functions above the superconducting transition temperature TC, in the framework of a functional integral approach. The coupling of the electronic self-energy to pair fluctuations, which are treated by means of a time-dependent Ginzburg–Landau equation, yields a double-peak structure, around the Fermi wavenumber. The peak separation is essentially temperature-independent, but the structure sharpens when TC is approached.
Titre
Excitation spectrum of the two-dimensional attractive Hubbard model
Date
1999-05
Publié dans
Physica C: Superconductivity
Volume
1999, vol. 317–318, pp. 482-485
Pagination
4 p.
ISSN
0921-4534
Type d'article
scientifique
Domaine
Ingénierie et Architecture
Ecole
HEIG-VD
Institut
iE - Institut des Energies
Note
CAPEZZALI, Massimiliano est chercheur à la HES-SO, HEIG-VD, depuis 2017.
Cette publication a été rédigée par un membre de l’ancien institut IESE - Institut d'Energie et Systèmes Electriques.