Metal-insulator transitions in systems with electron-phonon and Coulomb interactions

Details Metal-insulator transitions in systems with electron-phonon and Coulomb interactions Metal-insulator transitions in systems with electron-phonon and Coulomb interactions

2000-03-20

arxiv.org/abs/cond-mat/0003335v1

Physica B 292, 196 (2000)

Physics

Condensed Matter

Strongly Correlated Electrons

9 pages, RevTeX, 5 eps figure, additional material available at http://www.mpi-stuttgart.mpg.de/docs/ANDERSEN/fullerene/

Scientific paper

10.1016/S0921-4526(00)00482-8

We consider a model which includes the electron-phonon coupling to Ag or Jahn-Teller Hg phonons, the Coulomb interaction U and an exchange integral K. We study the metal-insulator transition for the integer fillings n=3 and 4. We find that the coupling to Ag phonons increases the critical value Uc where the transition takes place, while the coupling to Hg phonons decreases Uc. Without electron-phonon coupling the Hund's rule coupling also decreases Uc. There is, however, an interesting competition between the Hund's rule coupling and the Jahn-Teller effect. Thus the reduction of Uc due to the Hg phonons becomes smaller when the Hund's rule coupling is turned on. The implications of this is discussed in the context of AnC60.

Affiliated with

Also associated with

No associations

Rating

Metal-insulator transitions in systems with electron-phonon and Coulomb interactions 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 Metal-insulator transitions in systems with electron-phonon and Coulomb interactions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Metal-insulator transitions in systems with electron-phonon and Coulomb interactions will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-392462