Observation of wetting-like phase transitions in a surface-enhanced type-I superconductor

Details Observation of wetting-like phase transitions in a surface-enhanced type-I superconductor Observation of wetting-like phase transitions in a surface-enhanced type-I superconductor

Mar 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007njph....9...75k&link_type=abstract

New Journal of Physics, Volume 9, Issue 3, pp. 75 (2007).

Physics

8

Scientific paper

Superconductivity in single crystal Sn samples with surface-enhanced order parameter is studied experimentally. Controllable surface enhancement is achieved by mechanical polishing or by ion irradiation. A first-order surface superconductivity transition is found in parallel magnetic fields close to the bulk critical field Hc(T) and for temperatures above 0.8Tc up till a surface critical temperature Tcs > Tc, where Tc is the bulk critical temperature. The resulting phase diagram agrees with that predicted for interface-delocalization or wetting transitions in type-I superconductors, based on the Ginzburg Landau theory.

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