CONGRESOS, CURSOS Y CONFERENCIAS
Próximo Seminario INMA-JUNIOR Superconducting devices based on Bi2Se3 junctions
El próximo jueves, 11 de mayo, a las 11:45 horas tendrá lugar el próximo Seminario INMA-Junior en Aula del Edificio I+D del Campus Río Ebro. Tras el seminario tendrá lugar un
picoteo al que todos los asistentes podrán acudir.
SEMINARIO INMA-JUNIOR:
Fecha y hora: jueves 11 de mayo a las 11:45 h
Ponente: Rubén Gracia Abad
Título: SUPERCONDUCTING DEVICES BASED ON Bi2Se3 JUNCTIONS
Resumen de la charla:
Topological insulators are materials with an insulating bulk and metallic surface states protected by time reversal symmetry. In particular, Bi2Se3 has attracted much attention due to its simplicity and its relatively large band gap. These materials can be combined with superconductors to create hybrid devices presenting unconventional effects not observed in standard superconductor devices. Here, we explore the properties of hybrid superconductor devices combining Bi2Se3 and type-II superconductor WC fabricated by Focused Ion Beam (FIB)-related techniques. The electrical characterization of these devices shows that the superconductivity is induced in the topological insulator, presenting coherent transport through the Bi2Se3 junctions, which leads to a large modulation of the superconducting properties with complex features. Further modification of the device by FIB results in the suppression of this behaviour and seems to indicate that it was originated as an interference of two coherent channels, one coming from the bulk and the other one coming from the surface states.
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