Unusual magnetic field-induced phase transition in the mixed state of superconducting NbSe2
arXiv:cond-mat/0307349 · doi:10.1103/PhysRevLett.91.197005
Abstract
The thermal conductivity κin the basal plane of single-crystalline hexagonal NbSe2 has been measured as a function of magnetic field H, oriented both along and perpendicular to the c-axis, at several temperatures below T_c. With the magnetic field in the basal plane and oriented parallel to the heat flux we observed, in fields well below H_c2, an unexpected hysteretic behavior of κ(H) with all the generic features of a first order phase transition. The transition is not manifest in the κ(H) curves, if H is still in the basal plane but oriented perpendicularly to the heat-flux direction. The origin of the transition is not yet understood.
References in corpus (5)
- Heat Conduction in the Vortex State of NbSe_2: Evidence for Multi-Band Superconductivity
- Instabilities and disorder-driven first-order transition of the vortex lattice
- Thermal conductivity of single crystalline MgB_2
- Temperature dependence and anisotropy of the bulk upper critical field H_c2 of MgB_2
- Model of the mixed state of type-II superconductors in high magnetic fields