Field-angle resolved specific heat and thermal conductivity in the vortex phase of UPd_2Al_3

Abstract

The field-angle dependent specific heat and thermal conductivity in the vortex phase of UPd_2Al_3 is studied using the Doppler shift approximation for the low energy quasiparticle excitations. We first give a concise presentation of the calculation procedure of magnetothermal properties with vortex and FS averages performed numerically. The comparison of calculated field-angle oscillations and the experimental results obtained previously leads to a strong reduction of the possible SC candidate states in UPd_2Al_3. The possible SC gap functions have node lines in hexagonal symmetry planes containing either the zone center or the AF zone boundary along c. Node lines in non-symmetry planes can be excluded. We also calculate the field and temperature dependence of field-angular oscillation amplitudes. We show that the observed nonmonotonic field dependence and sign reversal of the oscillation amplitude is due to small deviations from unitary scattering.

16 pages, 8 figures

References in corpus (10)

• Multiple Superconducting Phases in New Heavy Fermion Superconductor PrOs4Sb12
• Field-angle Dependence of the Zero-Energy Density of States in the Unconventional Heavy-Fermion Superconductor CeCoIn5
• Direct Observation of Nodal Quasiparticles in an Unconventional Superconductor: Field-angle Dependent Heat Capacity of YNi2B2C
• Fermi surface and heavy masses for UPd${}_2$Al${}_3$
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• Strong-coupling theory of magnetic-exciton-mediated superconductivity in UPd${}_2$Al${}_3$
• Perturbation Theory on the Superconductivity of Heavy Fermion Superconductor UPd_2Al_3
• Efficient Selfconsistent Calculations of Multiband Superconductivity in UPd${}_2$Al${}_3$
• Gap Symmetry of Superconductivity in UPd2Al3

Cited by in corpus (3)

• Nodal Structure of Unconventional Superconductors Probed by the Angle Resolved Thermal Transport Measurements
• Connection between in-plane upper critical field $H_{c2}$ and gap symmetry in layered $d$-wave superconductors revisited
• Field angle-dependent thermal conductivity in nodal superconuctors