Project QuMat.1-UU-1.2C / 3.2C in Pillar 1 & 3

PhD student: Auke Vlasblom

Project Leader: Ingmar Swart

Scanning probe characterization and noise spectroscopy of hybrid topological superconductors

The electronic band structure of the hybrid material and all aspects of the helical states will be investigated with a combination of advanced scanning probe methods. We will check the atomic structure of the substrate/layer X/WTe2 system with atomically resolved AFM and STM. (Spin-polarized) STS provides the (spin-filtered) local density of states. The stability of the helical states with respect to (magnetic) scatterers will be investigated by placing scatterers on certain positions using atomic manipulation.

A vacuum suitcase transfer infrastructure will be developed to transfer successful devices of projects 3.1 and 3.2 to advanced scanning tunneling spectroscopy set-ups. Phase-biased experiments will be developed and equipped with tunnel probe read-out. Corbino-disk type experiments will be performed where Majoranas are swapped at high frequency while probing the tunneling density of states. Furthermore, the zero-energy modes will be characterized by shot-noise measurements.

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