3D-2D crossover in the naturally layered superconductor (LaSe)1.14(NbSe2)

Details 3D-2D crossover in the naturally layered superconductor (LaSe)1.14(NbSe2) 3D-2D crossover in the naturally layered superconductor (LaSe)1.14(NbSe2)

2001-11-26

arxiv.org/abs/cond-mat/0111483v1

Physics

Condensed Matter

Superconductivity

7 pages incl. 3 figures

Scientific paper

10.1016/S0921-4534(01)01221-7

The temperature and angular dependencies of the resistive upper critical magnetic field $B_{c2}$ reveal a dimensional crossover of the superconducting state in the highly anisotropic misfit-layer single crystal of (LaSe)$_{1.14}$(NbSe$_2$) with the critical temperature $T_c$ of 1.23 K. The temperature dependence of the upper critical field $B_{c2\parallel ab}(T)$ for a field orientation along the conducting $(ab)$-planes displays a characteristic upturn at 1.1 K and below this temperature the angular dependence of $B_{c2}$ has a cusp around the parallel field orientation. Both these typical features are observed for the first time in a naturally crystalline layered system.

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