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Local and Non-local Microwave Impedance of a Three-Terminal Hybrid Device

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arxiv 2207.12516 v1 pith:UQQMTDZA submitted 2022-07-25 cond-mat.mes-hall cond-mat.supr-con

B. Harlech-Jones , S. J. Waddy , J. D. S. Witt , D. Govender , L. Casparis , E. Martinez , R. Kallaher , S. Gronin
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G. Gardner M. J. Manfra D. J. Reilly
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classification cond-mat.mes-hallcond-mat.supr-con
keywords devicemeasurementshybridimpedancelocalmicrowavenon-localtechnique
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We report microwave impedance measurements of a superconductor-semiconductor hybrid nanowire device with three terminals (3T). Our technique makes use of transmission line resonators to acquire the nine complex scattering matrix parameters (S-parameters) of the device on fast timescales and across a spectrum of frequencies spanning 0.3 - 7 GHz. Via comparison with dc-transport measurements, we examine the utility of this technique for probing the local and non-local response of 3T devices where capacitive and inductive contributions can play a role. Such measurements require careful interpretation but may be of use in discerning true Majorana zero modes from trivial states arising from disorder.

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