Accessing topological superconductivity via a combined STM and renormalization group analysis.

نویسندگان

  • Lars Elster
  • Christian Platt
  • Ronny Thomale
  • Werner Hanke
  • Ewelina M Hankiewicz
چکیده

The search for topological superconductors has recently become a key issue in condensed matter physics, because of their possible relevance to provide a platform for Majorana bound states, non-Abelian statistics, and quantum computing. Here we propose a new scheme which links as directly as possible the experimental search to a material-based microscopic theory for topological superconductivity. For this, the analysis of scanning tunnelling microscopy, which typically uses a phenomenological ansatz for the superconductor gap functions, is elevated to a theory, where a multi-orbital functional renormalization group analysis allows for an unbiased microscopic determination of the material-dependent pairing potentials. The combined approach is highlighted for paradigmatic hexagonal systems, such as doped graphene and water-intercalated sodium cobaltates, where lattice symmetry and electronic correlations yield a propensity for a chiral singlet topological superconductor. We demonstrate that our microscopic material-oriented procedure is necessary to uniquely resolve a topological superconductor state.

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عنوان ژورنال:
  • Nature communications

دوره 6  شماره 

صفحات  -

تاریخ انتشار 2015