Open AccessVORTEX LATTICE IN A HIGH-Tc SUPERCONDUCTOR OF MIXED PAIRING SYMMETRY
Author(s) -
Qu Hai,
Shanshan Zhou
Publication year - 1999
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.48.352
Subject(s) - pairing , condensed matter physics , physics , vortex , tetragonal crystal system , superconductivity , lattice (music) , anisotropy , hexagonal lattice , type ii superconductor , antiferromagnetism , quantum mechanics , thermodynamics , phase (matter) , acoustics
Starting from a tight binding description,the existence of mixed s-dwave pairing state is discussed. Then,within the framework of the phenomenological G-L theory, the structure of vortex lattice in a high-Tc superconductor is studied.It is shown that there is a strong correlation between the structure of a single vortex and the shape of the vortex lattice.At low temperatures,with the existence of s-wave component and its coupling to d-wave component,the d-wave order parameter and the local magnetic field show tetragonal anisotropy,and the structure of vortex lattice is oblique;however,when the temperature is close to Tc, it may become triangular.