Helical networks in twisted bilayer graphene under interlayer bias
Entidad
UAM. Departamento de Física de la Materia CondensadaFecha de edición
2013-09-23Cita
10.1103/PhysRevB.88.121408
Physical Review B 88.12 (2013): 121408
ISSN
1098-0121; 1550-235X (online)DOI
10.1103/PhysRevB.88.121408Financiado por
We acknowledge financial support from the Spanish Ministry of Economy (MINECO) through the Ramón y Cajal programme, Grants No. FIS2010-21883 (E.P.), and No. FIS2011-23713, and from the European Research Council Advanced Grant, Contract No. 290846 (P.S-J.)Proyecto
Gobierno de España.FIS2010-21883; Gobierno de España. FIS2011-23713; info:eu-repo/grantAgreement/EC/FP7/290846Versión del editor
http://dx.doi.org/10.1103/PhysRevB.88.121408Materias
FísicaDerechos
© 2013 American Physical SocietyResumen
A twisted graphene bilayer exhibits a triangular Moir pattern in the local stacking, that smoothly alternates between the three basic types AA ′, AB′, and BA′. Under an interlayer bias U, the latter two types develop a spectral gap, characterizsed by opposite valley Chern numbers. We show that for large enough Moir periods and bias, these regions become depleted electronically, and topologically protected helical modes appear at their boundaries. This gives rise to a delocalized topological network of the Chalker-Coddington type, composed of valley current vortices. This network can be tailored by controlled deposition of valley-mixing adsorbates, which block transmission in selected links, thus opening the possibility of custom topological nanoelectronics
Lista de ficheros
Google Scholar:San-Jose, Pablo
-
Prada, Elsa
Lista de colecciones del ítem
Registros relacionados
Mostrando ítems relacionados por título, autor, creador y materia.
-
Quantum Hall effect in graphene with twisted bilayer stripe defects
Löfwander, Tomas; San-Jose, Pablo; Prada, Elsa
2013-05-21 -
Optical conductivity, Drude weight and plasmons in twisted graphene bilayers
Stauber, Tobias; San-Jose, Pablo; Brey, Luis
2013-11-01 -
SNS junctions in nanowires with spin-orbit coupling: Role of confinement and helicity on the subgap spectrum
Cayao, Jorge; Prada, Elsa; San-Jose, Pablo; Aguado, Ramón
2015-01-29