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Detection of Majorana Kramers Pairs Using a Quantum Point Contact

Author(s): Li, Jian; Pan, Wei; Bernevig, Bogdan A.; Lutchyn, Roman M

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dc.contributor.authorLi, Jian-
dc.contributor.authorPan, Wei-
dc.contributor.authorBernevig, Bogdan A.-
dc.contributor.authorLutchyn, Roman M-
dc.date.accessioned2020-10-30T19:20:29Z-
dc.date.available2020-10-30T19:20:29Z-
dc.date.issued2016-07-20en_US
dc.identifier.citationLi, Jian, Pan, Wei, Bernevig, B Andrei, Lutchyn, Roman M. (2016). Detection of Majorana Kramers Pairs Using a Quantum Point Contact. PHYSICAL REVIEW LETTERS, 117 (10.1103/PhysRevLett.117.046804en_US
dc.identifier.issn0031-9007-
dc.identifier.urihttp://arks.princeton.edu/ark:/88435/pr1h81b-
dc.description.abstractWe propose a setup that integrates a quantum point contact (QPC) and a Josephson junction on a quantum spin Hall sample, experimentally realizable in InAs/GaSb quantum wells. The confinement due to both the QPC and the superconductor results in a Kramers pair of Majorana zero-energy bound states when the superconducting phases in the two arms differ by an odd multiple of p across the Josephson junction. We investigate the detection of these Majorana pairs with the integrated QPC, and find a robust switching from normal to Andreev scattering across the edges due to the presence of Majorana Kramers pairs. Such a switching of the current represents a qualitative signature where multiterminal differential conductances oscillate with alternating signs when the external magnetic field is tuned. We show that this qualitative signature is also present in current cross-correlations. Thus, the change of the backscattering current nature affects both conductance and shot noise, the measurement of which offers a significant advantage over quantitative signatures such as conductance quantization in realistic measurements.en_US
dc.language.isoen_USen_US
dc.relation.ispartofPHYSICAL REVIEW LETTERSen_US
dc.rightsFinal published version. Article is made available in OAR by the publisher's permission or policy.en_US
dc.titleDetection of Majorana Kramers Pairs Using a Quantum Point Contacten_US
dc.typeJournal Articleen_US
dc.identifier.doidoi:10.1103/PhysRevLett.117.046804-
dc.date.eissued2016-07-20en_US
dc.identifier.eissn1079-7114-
pu.type.symplectichttp://www.symplectic.co.uk/publications/atom-terms/1.0/journal-articleen_US

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