Multiband superconductivity in NbSe_2 from heat transport

Details Multiband superconductivity in NbSe_2 from heat transport Multiband superconductivity in NbSe_2 from heat transport

2003-04-22

arxiv.org/abs/cond-mat/0304499v1

Physics

Condensed Matter

Superconductivity

2 pages, 2 figures, submitted to M2S-Rio 2003 Proceedings

Scientific paper

10.1016/j.physc.2004.03.055

The thermal conductivity of the layered s-wave superconductor NbSe_2 was measured down to T_c/100 throughout the vortex state. With increasing field, we identify two regimes: one with localized states at fields very near H_c1 and one with highly delocalized quasiparticle excitations at higher fields. The two associated length scales are most naturally explained as multi-band superconductivity, with distinct small and large superconducting gaps on different sheets of the Fermi surface.

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