Physics – Condensed Matter – Superconductivity
Scientific paper
2010-04-29
Phys. Rev. Lett. 105, 037006 (2010)
Physics
Condensed Matter
Superconductivity
5 pages, 3 figures. Published version. Streamlined presentation; typos corrected in Eqs. (14, 20) and elsewhere; improved Figs
Scientific paper
10.1103/PhysRevLett.105.037006
A Ginzburg-Landau approach to fluctuations of a layered superconductor in a magnetic field is used to show that the interlayer coupling can be incorporated within an interacting self-consistent theory of a single layer, in the limit of a large number of neighboring layers. The theory exhibits two phase transitions -- a vortex liquid-to-solid transition is followed by a Bose-Einstein condensation into the Abrikosov lattice -- illustrating the essential role of interlayer coupling. Using this theory, explicit expressions for magnetization, specific heat, and fluctuation conductivity are derived. We compare our results with recent experimental data on the iron-pnictide superconductors.
Murray James M.
Tesanovic Zlatko
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