Are there plasminos in superconductors?
Abstract
Description
Hot and/or dense, normal-conducting systems of relativistic fermions exhibit a particular collective excitation, the so-called plasmino. We compute the one-loop self-energy, the dispersion relation and the spectral density for fermions interacting via attractive boson exchange. It is shown that plasminos also exist in superconductors.
15 pages, 14 figures, revtex
15 pages, 14 figures, revtex