Interaction-induced zero-energy pinning and quantum dot formation in Majorana nanowires
| Autor: | Alfredo Levy Yeyati, Elsa Prada, Samuel D. Escribano |
|---|---|
| Přispěvatelé: | UAM. Departamento de Física de la Materia Condensada |
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
hybrid superconductor–semiconductor nanowires
Interactions Nanowire General Physics and Astronomy Zero-point energy FOS: Physical sciences quantum dots 02 engineering and technology Electron lcsh:Chemical technology lcsh:Technology 01 natural sciences Full Research Paper 0103 physical sciences Mesoscale and Nanoscale Physics (cond-mat.mes-hall) Nanotechnology lcsh:TP1-1185 General Materials Science Electrical and Electronic Engineering lcsh:Science 010306 general physics Wave function Physics Condensed matter physics Condensed Matter - Mesoscale and Nanoscale Physics Quantum dots lcsh:T Física Charge (physics) interactions 021001 nanoscience & nanotechnology lcsh:QC1-999 Magnetic field MAJORANA Nanoscience Majorana bound states Quantum dot lcsh:Q Hybrid superconductor-semiconductor nanowires 0210 nano-technology lcsh:Physics |
| Zdroj: | Beilstein Journal of Nanotechnology Beilstein Journal of Nanotechnology, Vol 9, Iss 1, Pp 2171-2180 (2018) Biblos-e Archivo. Repositorio Institucional de la UAM instname |
| ISSN: | 2190-4286 |
| Popis: | Majorana modes emerge in non-trivial topological phases at the edges of some specific materials, like proximitized semiconducting nanowires under a external magnetic field. Ideally, they are non-local states that are charge neutral superpositions of electrons and holes. However, in nanowires of realistic length their wave functions overlap and acquire a finite charge that, under certain circumstances, makes them susceptible to interactions, specifically with the image charges that arise in the electrostatic environment. Considering a realistic three-dimensional model of the dielectric surroundings, here we show that this interaction leads to a suppression of the Majorana oscillations predicted by simpler theoretical models, and to the formation of low-energy quantum dot states that interact with the Majorana modes. Both features are observed in recent experiments on the detection of Majoranas and could thus help to properly characterize them. Comment: 15 pages, 9 figures. Published version |
| Databáze: | OpenAIRE |
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