Physics – Condensed Matter – Superconductivity
Scientific paper
1996-09-06
Physics
Condensed Matter
Superconductivity
17 pages, LaTeX2e, uses AMS-fonts, 5 ps-figures included. Replaced by a completely revised version that contains several new r
Scientific paper
10.1002/andp.19975090305
We study the problem of the phonon-induced electron-electron interaction in a solid. Starting with a Hamiltonian that contains an electron-phonon interaction, we perform a similarity renormalization transformation to calculate an effective Hamiltonian. Using this transformation singularities due to degeneracies are avoided explicitely. The effective interactions are calculated to second order in the electron-phonon coupling. It is shown that the effective interaction between two electrons forming a Cooper pair is attractive in the whole parameter space. For a simple Einstein model we calculate the renormalization of the electronic energies and the critical temperature of superconductivity.
No associations
LandOfFree
Similarity renormalization of the electron--phonon coupling does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Similarity renormalization of the electron--phonon coupling, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Similarity renormalization of the electron--phonon coupling will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-382413