Abstract
The temperature dependence of the upper critical magnetic field in the quasi-one-dimensional molecular superconductor (TMTSFP was determined via resistivity, for the intrachain (a), interchain (b), and interplane directions. For H along a and b, exhibits pronounced positive curvature, with no sign of saturation to 0.1 K. A novel anisotropy inversion is observed, wherein grows larger than and exceeds the paramagnetic limit by more than 200%. The anomalous shape of is consistent with recent predictions of unconventional behavior in anisotropic superconductors, including the possibility of triplet pairing and reentrant superconductivity in very high field.
- Received 14 January 1997
DOI:https://doi.org/10.1103/PhysRevLett.78.3555
©1997 American Physical Society