Parametric exploration of zero-energy modes in three-terminal InSb-Al nanowire devices
article
We systematically study three-terminal InSb-Al nanowire devices by using radio-frequency reflectometry. Tunneling spectroscopy measurements on both ends of the hybrid nanowires are performed while systematically varying the chemical potential, magnetic field, and junction transparencies. Identifying the lowest-energy state allows for the construction of the lowest- and zero-energy state diagrams, which show how the states evolve as a function of the aforementioned parameters. Importantly, comparing the diagrams taken for each end of the hybrids enables the identification of states which do not coexist simultaneously, ruling out a significant amount of the parameter space as candidates for a topological phase. Furthermore, altering junction transparencies filters out zero-energy states sensitive to a local gate potential. Such a measurement strategy significantly reduces the time necessary to identify a potential topological phase and minimizes the risk of falsely recognizing trivial bound states as Majorana zero modes.
Topics
Antimony compoundsIII-V semiconductorsIndium antimonidesNanowiresRisk assessmentScanning tunneling microscopyTopologyHybrid nanowiresLowest energy stateNanowire devicesRadiofrequenciesReflectometrySpectroscopy measurementsTopological phaseTunneling spectroscopyZero energy modesZero energy stateTransparency
TNO Identifier
980672
ISSN
24699950
Source
Physical Review B, 106(7)
Publisher
American Physical Society
Article nr.
075306
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