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From Cooper-pairs to resonating bipolarons | | Julius Ranninger
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26 Jun 2006 | | Subject: | Superconductivity; Strongly Correlated Electrons | | Abstract: | After a short review of the different physics in the weak and strong coupling regime, resulting in amplitude fluctuation controlled Cooper pair superconductivity and phase fluctuation controlled superfluidity of tightly bound local polaron pairs, we suggest a scenario for the cross-over regime between those two. It is based on the idea of resonating Bipolarons inside a Fermi sea of uncorrelated electrons, similar to the Feshbach resonance in Fermionic gases in optical traps. Due to the competition between amplitude and phase correlations such systems in the cross-over regime can exhibit a superconductor to insulator transition upon varying the strength of that resonance. | | Source: | arXiv, cond-mat/0606656 | | Services: | Forum | Review | PDF | Favorites | |
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