Regensburg 2025 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 11: Superconductivity: Poster
TT 11.18: Poster
Montag, 17. März 2025, 15:00–18:00, P4
Positive Evidence for Bogoliubov-Fermi Surfaces in Al/InAs Hybrids — •Simon Feyrer1, Ignacio Lobato1, Vjeko Dimic1, Michael Prager1, Dominique Bougeard1, Matthias Kronseder1, Giorgio Biasiol4, Carlos Balseiro2, Liliana Arrachea2, Marco Aprili3, Christoph Strunk1, and Leandro Tosi1,2 — 1Institute of Experimental and Applied Physics, University of Regensburg, Germany — 2Centro Atomico Bariloche, Comision Nacional de Energia Atomica, Argentina — 3Laboratoire: Physic des Solides, Université Paris-Saclay, France — 4IOM CNR, Laboratorio TASC, Area Science Park Basovizza, Trieste, Italy
We present measurements of a lumped element microwave resonator made out of hybrid Al/InAs superconductor/semiconductor 2D heterostructures. In our device, the inductor is a narrow wire taylored in the material, dominating the kinetic inductance contribution. The resonance frequency depends on temperature, on power and strongly on in-plane magnetic field. We have observed a change of behavior as the magnetic field becomes larger than B*, consistent with a contribution of the superconducting 2DEG in the InAs affected by the spin-orbit coupling [1]. Using resonators with different geometries we discuss the correlation between the observed anisotropy and the crystal orientation.
[1] D. Phan et al., Phys. Rev. Lett. 128, 107701 (2022).
Keywords: microwave resonators; hybrid quantum circuits; proximity effect; Bogoliubov-Fermi surfaces; superconductor/semiconductor hybrids