English   español  
Por favor, use este identificador para citar o enlazar a este item: http://hdl.handle.net/10261/95684
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:

Topological superconductivity in metallic nanowires fabricated with a scanning tunneling microscope

AutorRodrigo, José G.; Crespo, V.; Suderow, H.; Vieira, S.; Guinea, F.
Fecha de publicación2013
EditorInstitute of Physics Publishing
CitaciónNew Journal of Physics 15: 055020 (2013)
ResumenWe report on several low-temperature experiments supporting the presence of Majorana fermions in superconducting lead nanowires fabricated with a scanning tunneling microscope (STM). These nanowires are the connecting bridges between the STM tip and the sample resulting from indentation-retraction processes. We show here that by a controlled tuning of the nanowire region, in which superconductivity is confined by applied magnetic fields, the conductance curves obtained in these situations are indicative of topological superconductivity and Majorana fermions. The most prominent feature of this behavior is the emergence of a zero bias peak in the conductance curves, superimposed on a background characteristic of the conductance between a normal metal and a superconductor in the Andreev regime. The zero bias peak emerges in some nanowires when a magnetic field larger than the lead bulk critical field is applied. This field drives one of the electrodes into the normal state while the other, the tip, remains superconducting on its apex. Meanwhile a topological superconducting state appears in the connecting nanowire of nanometric size. © IOP Publishing and Deutsche Physikalische Gesellschaft.
DescripciónContent from this work may be used under the terms of the Creative Commons Attribution 3.0 licence.
Versión del editorhttp://dx.doi.org/10.1088/1367-2630/15/5/055020
Identificadoresdoi: 10.1088/1367-2630/15/5/055020
issn: 1367-2630
Aparece en las colecciones: (ICMM) Artículos
Ficheros en este ítem:
Fichero Descripción Tamaño Formato  
Topological superconductivity.pdf1,06 MBAdobe PDFVista previa
Mostrar el registro completo

Artículos relacionados:

NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.