Local and nonlocal quantum transport due to Andreev bound states in finite Rashba nanowires with superconducting and normal sections
Richard Hess, Henry F. Legg, Daniel Loss, Jelena Klinovaja
Abstract
The authors analyze zero-energy Andreev bound states (ABSs) that form in three-terminal devices. For finite-size nanowires (typically 1 $\ensuremath{\mu}$m in current experiments), the ABS localization length is comparable to the length of the nanowire. The probability density of an ABS is therefore nonzero throughout the nanowire and differential-conductance calculations reveal a correlated zero-bias peak (ZBP) at both ends of the nanowire. The interplay of multiple ABSs can lead to a signature in conductance that is reminiscent of a topological phase transition.
Topics & Concepts
NanowireBound stateSuperconductivityCondensed matter physicsPhysicsMAJORANAConductanceLocal density of statesMagnetic fieldQuantum mechanicsUpper and lower boundsTopology (electrical circuits)Mathematical analysisMathematicsCombinatoricsTopological Materials and PhenomenaQuantum and electron transport phenomenaAdvanced Condensed Matter Physics