Accueil > Agenda Scientifique

12 juillet 2018: 1 événement

séminaire

  • Topologically protected Landau level in the vortex lattice of a Weyl superconductor

    Jeudi 12 juillet 11:00-12:00 - Carlo Beenakker - Université de Sherbrooke

    Topologically protected Landau level in the vortex lattice of a Weyl superconductor

    Résumé : The question whether the mixed phase of a gapless superconductor can support a Landau level is a celebrated problem in the context of d-wave superconductivity, with a negative answer : The scattering of the subgap excitations (massless Dirac fermions) by the vortex lattice obscures the Landau level quantization. We have found that the same question has a positive answer for a Weyl superconductor : The chirality of the Weyl fermions protects the zeroth Landau level by means of a topological index theorem. As a result, the heat conductance parallel to the magnetic field through an area enclosing N vortices is quantized at N/2 times the thermal conductance quantum.

    Lieu : Grand Amphi RDC @ LPS, bât 510

    En savoir plus : Topologically protected Landau level in the vortex lattice of a Weyl superconductor