ISSN:
1572-9605
Keywords:
bipolaron
;
polaron
;
electron-phonon coupling
;
superconductivity
Source:
Springer Online Journal Archives 1860-2000
Topics:
Electrical Engineering, Measurement and Control Technology
,
Physics
Notes:
Abstract We explore the properties of the bipolaron in a 1D Holstein–Hubbard model with dynamical quantum phonons. We apply strong coupling theory to investigate the intersite bipolaron. We investigate the influence of the Hubbard interaction on the bipolaron binding energy, effective mass, and phase diagram. We compare our analytic results to recent numerical calculations [1]. In the intermediate and strong coupling regimes, a bipolaron is stable beyond the naive stability limit U 0 = 2ωg 2. The intersite bipolaron has a significantly reduced mass compared to the single site bipolaron, and is stable in the strong coupling regime up toU c ∼ 4ωg 2.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1023/A:1026466711595
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