Topological superconductivity in curved nanoarchitectures

The goal of this WP is to shed a light on ways to geometrically tune the physical ingredients for the generation of Majorana modes in order to finally achieve their experimental detection.

As a first step, the effects of geometric curvature on the superconducting order parameter pairing symmetry will be investigated. We will look in particular at the interplay between curvature induced Rashba spin-orbit coupling and other relevant microscopic parameters, such as the chemical potential, the magnetic field and the spatial inhomogenieties of these physical quantities in driving topological non trivial superconducting phases. In a self-consistent way we will apply a lattice approach to determine the atomic scale spatial profile of the superconducting correlations, the charge density and the magnetic moment both in a bulk and in a spatially inhomogeneous system. Such methodology will give us access to the effects of interface electronic reconstruction, bound states formation and superconducting proximity effects at the boundaries of inhomogeneous regions. We will perform our investigation addressing several schematic realizations of the realistic physical systems, looking for the geometrical configurations that are best suited to generate and localize Majorana modes in a range of realistic microscopic parameters.
 
By exploiting the facilities and expertise of the Consortium Institutions we will theoretically and experimentally address the signatures of Majorana states in tunneling spectroscopy experiments both in curved superconducting/semiconducting heterostructures and in single material strongly curved s-wave superconducting nanomembranes.

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Matias Garcia



The project CNTQC acknowledges the financial support of the Future and Emerging Technologies (FET) programme within the
Seventh Framework Programme for Research of the European Commission, under FET-Open grant number: 618083.