Nonlocal conductance spectroscopy of Andreev bound states in gate-defined InAs/Al nanowires
Andreas Pöschl, Alisa Danilenko, Deividas Sabonis, Kaur Kristjuhan, Tyler Lindemann, Candice Thomas, Michael J. Manfra, C. M. Marcus
Abstract
Andreev bound states emerge as excitations in semiconducting InAs, proximitized by superconducting Al. These states can be a mixture of electron and hole and their structure is determined by material parameters, external magnetic field, and gate voltages. Nonlocal conductance is a differential measurement of the current carried by Andreev bound states through a quasi-one-dimensional nanowire, and it can reveal the charge character of the states given by the BCS charge.
Topics & Concepts
Bound stateNanowireCondensed matter physicsAndreev reflectionHeterojunctionQuantum tunnellingSuperconductivitySpectroscopyConductanceCharge (physics)PhysicsSemiconductorChemistryQuantum mechanicsQuantum and electron transport phenomenaTopological Materials and PhenomenaPhysics of Superconductivity and Magnetism