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dc.contributor.authorSetiawan, F.en_US
dc.contributor.authorWu, Chien-Teen_US
dc.contributor.authorLevin, K.en_US
dc.date.accessioned2019-08-02T02:18:34Z-
dc.date.available2019-08-02T02:18:34Z-
dc.date.issued2019-05-21en_US
dc.identifier.issn2469-9950en_US
dc.identifier.urihttp://dx.doi.org/10.1103/PhysRevB.99.174511en_US
dc.identifier.urihttp://hdl.handle.net/11536/152372-
dc.description.abstractExperiments on planar Josephson-junction architectures have recently been shown to provide an alternative way of creating topological superconductors hosting accessible Majorana modes. These zero-energy modes can be found at the ends of a one-dimensional channel in the junction of a two-dimensional electron gas (2DEG) proximitized by two spatially separated superconductors. The channel, which is below the break between the superconductors, is not in direct contact with the superconducting leads, so that proximity coupling is expected to be weaker and less well controlled than in the simple nanowire configuration widely discussed in the literature. This provides a strong incentive for this paper which investigates the nature of proximitization in these Josephson-junction architectures. At a microscopic level we demonstrate how and when it can lead to topological phases. We do so by going beyond simple tunneling models through solving self-consistently the Bogoliubov-de Gennes equations of a heterostructure multicomponent system involving two spatially separated s-wave superconductors in contact with a normal Rashba spin-orbit-coupled 2DEG. Importantly, within our self-consistent theory we present ways of maximizing the proximity-induced superconducting gap by studying the effect of the Rashba spin-orbit coupling, chemical potential mismatch between the superconductor and 2DEG, and sample geometry on the gap. Finally, we note (as in experiment) a Fulde-Ferrell-Larkin-Ovchinnikov phase is also found to appear in the 2DEG channel, albeit under circumstances which are not ideal for the topological superconducting phase.en_US
dc.language.isoen_USen_US
dc.titleFull proximity treatment of topological superconductors in Josephson-junction architecturesen_US
dc.typeArticleen_US
dc.identifier.doi10.1103/PhysRevB.99.174511en_US
dc.identifier.journalPHYSICAL REVIEW Ben_US
dc.citation.volume99en_US
dc.citation.issue17en_US
dc.citation.spage0en_US
dc.citation.epage0en_US
dc.contributor.department電子物理學系zh_TW
dc.contributor.departmentDepartment of Electrophysicsen_US
dc.identifier.wosnumberWOS:000469052200004en_US
dc.citation.woscount2en_US
Appears in Collections:Articles