Anisotropic magnetic field dependence in hybrid superconductor/semiconductor microwave resonator as a signature of non-trivial induced superconductivity

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 an anisotropic magnetic field dependence, stronger when the field is perpendicular to the wire, consistent with a contribution of the superconducting 2DEG in the InAs affected by the spin-orbit coupling [1].

[1] D. Phan et al., Phys. Rev. Lett. 128, 107701 (2022)