## Excitation spectrum of the two-dimensional attractive Hubbard model

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.

Published in:
Physica C, 317-318, 482-485
Year:
1999
Publisher:
Elsevier
ISSN:
0921-4534
Keywords:
Laboratories:

Note: The status of this file is: EPFL only