Thermal fluctuations correction to magnetization and specific heat of vortex solids in type II superconductors

Details Thermal fluctuations correction to magnetization and specific heat of vortex solids in type II superconductors Thermal fluctuations correction to magnetization and specific heat of vortex solids in type II superconductors

2001-07-08

arxiv.org/abs/cond-mat/0107168v1

Phys. Rev. B 65, 024514 (2002)

Physics

Condensed Matter

Superconductivity

19 pages, 7 figures

Scientific paper

10.1103/PhysRevB.65.024514

A systematic calculation of magnetization and specific heat contributions due to fluctuations of vortex lattice in strongly type II superconductors to precision of 1% is presented. We complete the calculation of the two loop low temperature perturbation theory by including the umklapp processes. Then the gaussian variational method is adapted to calculation of thermodynamic characteristics of the 2D and the 3D vortex solids in high magnetic field. Based on it as a starting point for a perturbation theory we calculate the leading correction providing simultaneously an estimate of precision. The results are compared to existing nonperturbative approaches.

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