Penetration depth study of superconducting gap structure of 2\textit{H}-NbSe${}_2$

Abstract

We report measurements of the temperature dependence of both in-plane and out-of-plane penetration depths (${\lambda }_a$ and ${\lambda }_c$ respectively) in 2\textit{H}-NbSe${}_2$. Measurements were made with a radio-frequency tunnel diode oscillator circuit at temperatures down to 100 mK. Analysis of the anisotropic superfluid density shows that a reduced energy gap is located on one or more of the quasi-two-dimensional Nb Fermi surface sheets rather than on the Se sheet, in contrast to some previous reports. This result suggests that the gap structure is not simply related to the weak electron-phonon coupling on the Se sheet and is therefore important for microscopic models of anisotropic superconductivity in this compound.

4 pages, Revtex

References in corpus (11)

• Beyond Eliashberg superconductivity in MgB2: anharmonicity, two-phonon scattering, and multiple gaps
• Two-gap superconductivity in MgB${}_2$: clean or dirty?
• Phenomenological two-gap model for the specific heat of MgB_2
• Fermi Surface Nesting and the Origin of the Charge Density Wave in NbSe${}_2$
• Heat Conduction in the Vortex State of NbSe_2: Evidence for Multi-Band Superconductivity
• Quasi-Particle Spectra, Charge-Density-Wave, Superconductivity and Electron-Phonon Coupling in 2H-NbSe2
• Meissner - London state in superconductors of rectangular cross-section in perpendicular magnetic field
• Exponential Temperature Dependence of Penetration Depth in Single Crystal MgB_2
• Temperature dependent anisotropy of the penetration depth and coherence length in MgB$_2
• Absence of non-linear Meissner effect in YBa2Cu3O6.95
• Field dependence of the vortex core size in a multi-band superconductor

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