Crossover and scaling in a two-dimensional field-tuned superconductor

Details Crossover and scaling in a two-dimensional field-tuned superconductor Crossover and scaling in a two-dimensional field-tuned superconductor

2002-12-16

arxiv.org/abs/cond-mat/0212370v2

Phys. Rev. B 69, 014512 (2004)

Physics

Condensed Matter

Strongly Correlated Electrons

5 pages, 2 figures, corrected and modified according to referee Reports

Scientific paper

10.1103/PhysRevB.69.014512

Using an analysis similar to that of Imry and Wortis, it is shown that the apparent first order superconductor to metal transition, which has been claimed to exist at low values of the magnetic field in a two-dimensional field-tuned system at zero temperature,can be consistentlyinterpreted as a sharp crossover from a strong superconductor to an inhomogeneous state, which is a weak superconductor. The true zero-temperature superconductor to insulator transition within the inhomogenous state is conjectured to be that of randomly diluted XY model. An explaination of the observed finite temperature approximate scaling of resistivity close to the critical point is speculated within this model.

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