Ansiotropic s- wave superconductivity in borocarbides LuNi2B2C and YNi2B2C

Abstract

The symmetry of superconductivity in borocarbides LuNi2B2C and YNi2B2C is an outstanding issue. Here an anisotropic s- wave order parameter (or s+g model) is proposed for these borocarbides. In spite of the dominant s- wave component the proposed superconducting order parameter has nodes and gives rise to the H^(1/2) dependent specific heat in the vortex state (the Volovik effect). This model predicts the fourfold symmetry both in the angular dependent thermal conductivity and in the excess Dingle temperature in the vortex state, which should be readily accessible experimentally.

4 pages, 3 figures

References in corpus (7)

• Angular Position of Nodes in the Superconducting Gap of Quasi-2D Heavy-Fermion Superconductor CeCoIn_5
• Superconducting Gap Structure of Spin-Triplet Superconductor Sr_2RuO_4 Studied by Thermal Conductivity
• Superconducting Gap Structure of kappa-(BEDT-TTF)2Cu(NCS)2 Probed by Thermal Conductivity Tensor
• Highly Anisotropic Gap Function in Borocarbide Superconductor LuNi_2B_2C
• Low Energy Quasiparticle Excitation in the Vortex State of Borocarbide Superconductor YNi_2B_2C
• Anisotropic s-wave superconductivity in MgB_2
• Nonlinear response and scaling law in the vortex state of d-wave superconductors

Cited by in corpus (43)

• Gap Function with Point Nodes in Borocarbide Superconductor YNi_2B_2C
• Nodal Structure of Unconventional Superconductors Probed by the Angle Resolved Thermal Transport Measurements
• A review of two-band superconductivity: materials and effects on the thermodynamic and reversible mixed-state properties
• Imaging superconducting vortex core and lattice with the scanning tunneling microscope
• Direct Observation of Nodal Quasiparticles in an Unconventional Superconductor: Field-angle Dependent Heat Capacity of YNi2B2C
• Field dependence of the zero energy density of states around vortices in an anisotropic gap superconductor
• Reentrant vortex lattice transformation in four-fold symmetric superconductors
• Evidence of gap anisotropy in superconducting YNi2B2C using directional point contact spectroscopy
• Comparative analysis of specific heat of YNi2B2C using nodal and two-gap models
• Pressure dependence of the upper critical field of MgB2 and of YNi2B2C
• A phenomenology for multiple phases in the heavy fermion skutterudite superconductor PrOs4Sb12
• Magnetic field dependence of superconducting energy gaps in YNi2B2C: Evidence of multiband superconductivity
• Point Contact Spectroscopy of Superconducting Gap Anisotropy in Nickel Borocarbide Compound LuNi2B2C
• Multiphase Superconductivity in Skutterudite PrOs_4Sb_12
• Quantum limiting behaviors of a vortex core in an anisotropic gap superconductor
• Supercurrent in Nodal Superconductors
• Quasiparticle spectrum of the hybrid s+g-wave superconductors YNi_2B_2C and LuNi_2B_2C
• Strongly Anisotropic s-Wave Gaps in Exotic Superconductors
• Analytical Formulation of the Local Density of States around a Vortex Core in Unconventional Superconductors
• Negative thermal magnetoresistivity as a signature of chiral anomaly in Weyl superconductors
• Influence of Fermi surface topology on the quasiparticle spectrum in the vortex state
• Positions of Point-Nodes in Borocarbide Superconductor YNi2B2C
• Distribution of the superconducting gap in an YNi2B2C film studied by point contact spectroscopy
• Superconducting order parameter in nonmagnetic borocarbides RNi${}_2$B${}_2$C (R=Y, Lu) probed by point-contact Andreev reflection spectroscopy
• Impurity effects on s+g-wave superconductivity in borocarbides Y(Lu)Ni_2B_2C
• BCS theory for s+g-wave superconductivity borocarbides Y(Lu)Ni${}_2$B${}_2$C
• Point-contact spectroscopy of the nickel borocarbide superconductor YNi2B2C in the normal and superconducting state
• Vortex lattice studies in CeCoIn5 with H perpendicular to c
• Direct observation of a Fermi surface and superconducting gap in LuNi2B2C
• Small-angle neutron scattering study of the vortex lattice in superconducting LuNi2B2C
• Field-induced gapless electron pocket in the superconducting vortex phase of YNi2B2C as probed by magnetoacoustic quantum oscillations
• Investigation of the superconducting energy gap in the compound LuNi${}_2$B${}_2$C by the method of point contact spectroscopy: two-gap approximation
• Study on Unconventional Superconductors via Angle-resolved Specific Heat
• Superconducting materials - a topical overview
• Evolution of ground state and upper critical field in R(1-x)GdxNi2B2C (R = Lu, Y): Coexistence of superconductivity and spin-glass state
• Directional tunnelling spectroscopy of a normal metal-$s+g$-wave superconductor junction
• Field angle dependence of the zero-energy density of states in unconventional superconductors: analysis of the borocarbide superconductor YNi2B2C
• Effect of External Magnetic Field on the Co-existence of Superconductivity and Antiferromagnetism in rare Earth Nickle Borocarbides (RNi2B2C)
• Josephson effect in a weak link between borocarbides
• Thermal conductivity in B- and C- phase of UPt_3
• Unconventional superconductivity in YNi2B2C
• Boron isotope effect in single crystals of ErNi${}_2$B${}_2$C superconductor
• Unconventional superconductivity in the nickel-chalcogenide superconductor, TlNi${}_2$Se${}_2$