New features of the phase transition to superconducting state in thin films

Abstract

The Halperin-Lubensky-Ma (HLM) effect of a fluctuation-induced change of the order of phase transition in thin films of type I superconductors with relatively small Ginzburg-Landau number $\kappa$ is considered. Numerical data for the free energy, the order parameter jump, the latent heat, and the specific heat of W, Al and In are presented to reveal the influence of film thickness and material parameters on the properties of the phase transition. We demonstrate for the first time that in contrast to the usual notion the HLM effect occurs in the most distinct way in superconducting films with high critical magnetic field $H_{c0}$ rather than in materials with small $\kappa$. The possibility for an experimental observation of the fluctuation change of the order of superconducting phase transition in superconducting films is discussed.

11 pages, MikTexTeX, 3 fig, 2 Tables, corrected some typos, Submitted J.Phys:Cond Mat

References in corpus (8)

• Nature of the Quantum Phase Transition in Clean, Itinerant Heisenberg Ferromagnets
• Some basic aspects of quantum phase transitions
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• Gauge Fluctuations in Superconducting Films
• Critical behaviour of thin films with quenched impurities
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• About the magnetic fluctuation effect on the phase transition to superconducting state in Al
• Thermodynamic properties of the phase transition to superconducting state in thin films of type I superconductors

Cited by in corpus (1)

• Comment on "First-order phase transitions of type-I superconducting films" [Phys. Rev. A 322 (2004) 111]