Open AccessThe two-band Ginzburg-Landau theory analysis of the surface critical field of the two-band superconductor Lu2Fe3Si5
Author(s) -
Minxia Liu
Publication year - 2011
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.60.017401
Subject(s) - superconductivity , critical field , condensed matter physics , physics , ginzburg–landau theory , magnetic field , field (mathematics) , surface (topology) , plane (geometry) , type ii superconductor , quantum mechanics , geometry , mathematics , pure mathematics
Two-band Ginzburg-Landau (GL) theory is adopted to analyze the surface critical field Hc3 of Lu2Fe3Si5 . When the surface of a superconductor coincides with any of crystallographic planes and is parallel to the external magnetic field H, the ratio Hc3/Hc2 (where Hc2 is the upper critical field of Lu2Fe3Si5) is strongly dependent on temperature. When the surface of a superconductor coincides with the bc plane and is parallel to H, the ratio depends not only on temperature, but also on the angle between the c axis and H. However, the ratio is constant for single-band superconductors.