Effects of the electrostatic environment on superlattice Majorana nanowires
Finding ways of creating, measuring, and manipulating Majorana bound states (MBSs) in superconducting-semiconducting nanowires is a highly pursued goal in condensed matter physics. It was recently proposed that a periodic covering of the semiconducting nanowire with superconductor fingers would allo...
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creator | Escribano, Samuel D. Levy Yeyati, Alfredo Oreg, Yuval Prada, Elsa |
description | Finding ways of creating, measuring, and manipulating Majorana bound states (MBSs) in superconducting-semiconducting nanowires is a highly pursued goal in condensed matter physics. It was recently proposed that a periodic covering of the semiconducting nanowire with superconductor fingers would allow both gating and tuning the system into a topological phase while leaving room for a local detection of the MBS wave function. We perform a detailed, self-consistent numerical study of a three-dimensional (3D) model for a finite-length nanowire with a superconductor superlattice including the effect of the surrounding electrostatic environment, and taking into account the surface charge created at the semiconductor surface. We consider different experimental scenarios where the superlattice is on top or at the bottom of the nanowire with respect to a back gate. The analysis of the 3D electrostatic profile, the charge density, the low-energy spectrum, and the formation of MBSs reveals a rich phenomenology that depends on the nanowire parameters as well as on the superlattice dimensions and the external back-gate potential. The 3D environment turns out to be essential to correctly capture and understand the phase diagram of the system and the parameter regions where topological superconductivity is established. |
doi_str_mv | 10.1103/PhysRevB.100.045301 |
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The 3D environment turns out to be essential to correctly capture and understand the phase diagram of the system and the parameter regions where topological superconductivity is established.</description><subject>Charge density</subject><subject>Condensed matter physics</subject><subject>Energy spectra</subject><subject>Nanowires</subject><subject>Parameters</subject><subject>Phase diagrams</subject><subject>Phenomenology</subject><subject>Superconductivity</subject><subject>Superlattices</subject><subject>Surface charge</subject><subject>Three dimensional models</subject><subject>Topology</subject><issn>2469-9950</issn><issn>2469-9969</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2019</creationdate><recordtype>article</recordtype><recordid>eNo9kMtOQjEQhhujiQR5AjdNXB-cnp4LXSrBS8RojK6boWcaDoEW24Lh7a1BXc3tz8z8H2OXAsZCgLx-XR7iG-1vxwJgDFUtQZywQVk1qlCqUaf_eQ3nbBTjCgBEA6oFNWBPM2vJpMi95WlJnNa5Cj4mTL3h5PZ98G5DLnHveNxtKawx5RHxZ1z5gA65Q-e_-kDxgp1ZXEca_cYh-7ibvU8fivnL_eP0Zl4YWclUTITsamtwIVFVi9KSMl2tJhYWdYNlC6IGRNtSI0T-H1sy2FUlNVaKCoTt5JBdHfdug__cUUx65XfB5ZO6LFspJtkaZJU8qky2EwNZvQ39BsNBC9A_4PQfuNwAfQQnvwG9AGPT</recordid><startdate>20190702</startdate><enddate>20190702</enddate><creator>Escribano, Samuel D.</creator><creator>Levy Yeyati, Alfredo</creator><creator>Oreg, Yuval</creator><creator>Prada, Elsa</creator><general>American Physical Society</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7SR</scope><scope>7U5</scope><scope>8BQ</scope><scope>8FD</scope><scope>H8D</scope><scope>JG9</scope><scope>L7M</scope><orcidid>https://orcid.org/0000-0001-7522-4795</orcidid></search><sort><creationdate>20190702</creationdate><title>Effects of the electrostatic environment on superlattice Majorana nanowires</title><author>Escribano, Samuel D. ; Levy Yeyati, Alfredo ; Oreg, Yuval ; Prada, Elsa</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c343t-813d5fcab3a94b2fe9cd598f0b56a270150aaf7e611996a7ecad42e6f31401fd3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2019</creationdate><topic>Charge density</topic><topic>Condensed matter physics</topic><topic>Energy spectra</topic><topic>Nanowires</topic><topic>Parameters</topic><topic>Phase diagrams</topic><topic>Phenomenology</topic><topic>Superconductivity</topic><topic>Superlattices</topic><topic>Surface charge</topic><topic>Three dimensional models</topic><topic>Topology</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Escribano, Samuel D.</creatorcontrib><creatorcontrib>Levy Yeyati, Alfredo</creatorcontrib><creatorcontrib>Oreg, Yuval</creatorcontrib><creatorcontrib>Prada, Elsa</creatorcontrib><collection>CrossRef</collection><collection>Engineered Materials Abstracts</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Materials Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Physical review. 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It was recently proposed that a periodic covering of the semiconducting nanowire with superconductor fingers would allow both gating and tuning the system into a topological phase while leaving room for a local detection of the MBS wave function. We perform a detailed, self-consistent numerical study of a three-dimensional (3D) model for a finite-length nanowire with a superconductor superlattice including the effect of the surrounding electrostatic environment, and taking into account the surface charge created at the semiconductor surface. We consider different experimental scenarios where the superlattice is on top or at the bottom of the nanowire with respect to a back gate. The analysis of the 3D electrostatic profile, the charge density, the low-energy spectrum, and the formation of MBSs reveals a rich phenomenology that depends on the nanowire parameters as well as on the superlattice dimensions and the external back-gate potential. 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subjects | Charge density Condensed matter physics Energy spectra Nanowires Parameters Phase diagrams Phenomenology Superconductivity Superlattices Surface charge Three dimensional models Topology |
title | Effects of the electrostatic environment on superlattice Majorana nanowires |
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