Scattering of topological kink-antikink states in bilayer graphene

Autor:	Serra, Llorenç, Benchtaber, Nassima, Sánchez, David
Rok vydání:	2021
Zdroj:	Digital.CSIC. Repositorio Institucional del CSIC instname
Popis:	Trabajo presentado en Frontiers of Quantum and Mesoscopic Thermodynamics (FQMT 2021), celebrado online en Praga del 18 al 24 de julio de 2021. Gapped bilayer graphene can support the presence of intragap states due to kink gate potentials applied to the graphene layers. Electrons in these states display valley-momentum locking, which makes them attractive for topological valleytronics. Here, we show that kink-antikink local potentials enable modulated scattering of topological currents. We find that the kinkantikink coupling leads to anomalous steps in the junction conductance. Further, when the constriction detaches from the propagating modes, forming a loop, the conductance reveals the system energy spectrum. Remarkably, these kink-antikink devices can also work as valley filters with tiny magnetic fields.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::23e61391b5959ba881efbd3b6539b48c http://hdl.handle.net/10261/267157 Zobrazit plný text záznamu