The anharmonic electron-phonon problem
|Title||The anharmonic electron-phonon problem|
|Publication Type||Journal Article|
|Year of Publication||1996|
|Authors||Freericks, J. K., Jarrell M., and Mahan G. D.|
|Journal||Physical Review Letters|
The anharmonic electron-phonon problem is solved in the infinite-dimensional limit using quantum Monte Carlo simulation. Charge-density-wave order is seen to remain at half filling even though the anharmonicity removes the particle-hole symmetry of the model. Superconductivity is strongly favored away from half filling but the anharmonicity does not enhance transition temperatures over the maximal values found in the harmonic limit.