Pressure induced effects on the Fermi surface of superconducting 2H-NbSe${}_2$

Abstract

The pressure dependence of the critical temperature $T_c$ and upper critical field $H_{c2}(T)$ has been measured up to 19 GPa in the layered superconducting material 2H-NbSe${}_2$. Relating the behavior of $H_{c2}(T)$ to Fermi surface parameters, we find that the electron phonon coupling of the 2D Nb 4d derived bands shows a peak at 5 GPa when the charge density wave (CDW) order is suppressed. On the other hand, $T_c(P)$ shows a bell shaped curve with a maximum at 10.5 GPa, well above the pressure for the suppression of the CDW order. Changes in the band structure produce this shift in the maximum of $T_c(P)$, demonstrating that 2H-NbSe${}_2$ shows important differences with respect to other compounds where $T_c$ has a maximum in the temperature-density phase diagram shaped by the suppression of another, non-superconducting, ground state.

5 pages, 4 figures. Small changes in discussion. Typos corrected

References in corpus (12)

• Superconductivity of MgB2: Covalent Bonds Driven Metallic
• CDW, Superconductivity and Anomalous Metallic Behavior in 2D Transition Metal Dichalcogenides
• Upper critical field pecularities of superconducting YNi2B2C and LuNi2B2C
• 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
• Fermi surface topology and the upper critical field in two-band superconductors - application to MgB2
• Nesting properties and anisotropy of the Fermi surface of LuNi${}_2$B${}_2$C
• STM study of multiband superconductivity in NbSe2 using a superconducting tip
• Superconducting phase diagram of the filled skuterrudite PrOs4Sb12
• Phonon-mediated anisotropic superconductivity in the Y and Lu nickel borocarbides
• Pressure dependence of the upper critical field of MgB2 and of YNi2B2C
• {\em Ab Initio} Calculations of ${\mathbf{H}}_{c2}$ in Type-II Superconductors: Basic Formalism and Model Calculations

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