Physics – Condensed Matter – Superconductivity
Scientific paper
2000-12-06
Phys.Rept. 349 (2001) 1-123
Physics
Condensed Matter
Superconductivity
129 pages, Elsart, 28 EPS figures; Physics Reports, in press. Authors related information under "http://nonlin.bitp.kiev.ua/
Scientific paper
10.1016/S0370-1573(00)00114-9
This article reviews the current status of precursor superconducting phase fluctuations as a possible mechanism for pseudogap formation in high-temperature superconductors. In particular we compare this approach which relies on the two-dimensional nature of the superconductivity to the often used $T$-matrix approach. Starting from simple pairing Hamiltonians we present a broad pedagogical introduction to the BCS-Bose crossover problem. The finite temperature extension of these models naturally leads to a discussion of the Berezinskii-Kosterlitz-Thouless superconducting transition and the related phase diagram including the effects of quantum phase fluctuations and impurities. We stress the differences between simple Bose-BCS crossover theories and the current approach where one can have a large pseudogap region even at high carrier density where the Fermi surface is well-defined. The Green's function and its associated spectral function, which explicitly show non-Fermi liquid behaviour, is constructed in the presence of vortices. Finally different mechanisms including quasi-particle-vortex and vortex-vortex interactions for the filling of the gap above $T_c$ are considered.
Loktev Vadim M.
Quick Rachel M.
Sharapov Sergei G.
No associations
LandOfFree
Phase Fluctuations and Pseudogap Phenomena 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 Phase Fluctuations and Pseudogap Phenomena, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Phase Fluctuations and Pseudogap Phenomena will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-579126