Open AccessVortex penetration depth of organic superconductors: Evidence for vortex lattice melting
Author(s) -
N. H. Tea,
R. W. Giannetta,
M. B. Salamon,
Jonathan M. J. Williams,
H.H. Wang,
U. Geiser
Publication year - 1997
Language(s) - English
Resource type - Reports
DOI - 10.2172/505384
Subject(s) - vortex , condensed matter physics , superconductivity , penetration depth , scaling , lattice (music) , type ii superconductor , magnetic field , vortex state , london penetration depth , physics , penetration (warfare) , materials science , chemistry , thermodynamics , geometry , optics , quantum mechanics , mathematics , operations research , acoustics
The authors observe a crossover field H* in the temperature and magnetic field dependence of the rf vortex penetration depth in {kappa}-(ET){sub 2}Cu[N(CN){sub 2}]Br for {rvec H}{sub dc}{parallel}{cflx b}-axis. They find that H* can be described quantitatively by the 3D Lindemann melting theory; thus, it corresponds to the melting of the vortex lattice in {kappa}-(ET){sub 2}Cu[N(CN){sub 2}]Br and lies very close to the irreversibility line. In the vortex-liquid state, they argue that the saturation of the vortex penetration depth in a magnetic field results from the finite size of the sample. The results do not have the scaling form predicted by the Coffey-Clem model in contrast to previous findings