GHAEMI, Pouyan; CAYSSOL, Jérôme; SHENG, D. N.; VISHWANATH, Ashvin

doi:10.1103/PhysRevLett.108.266801

Metadatos

Licencia de uso del documento

GHAEMI, Pouyan
Department of Physics
Department of Physics [Berkeley]
Materials Science Division [LBNL Berkeley]

CAYSSOL, Jérôme
Department of Physics [Berkeley]
Max-Planck-Institut für Physik komplexer Systeme [MPI-PKS]
Laboratoire Ondes et Matière d'Aquitaine [LOMA]

SHENG, D. N.
Department of Physics and Astronomy [Northridge]

Idioma

Article de revue

Este ítem está publicado en

Physical Review Letters. 2012, vol. 108, n° 26, p. 266801

American Physical Society

Resumen en inglés

We show that strained or deformed honeycomb lattices are promising platforms to realize fractional topological quantum states in the absence of any magnetic field. The strained induced pseudo magnetic fields are oppositely oriented in the two valleys [1-3] and can be as large as 60-300 Tesla as reported in recent experiments [4,5]. For strained graphene at neutrality, a spin or a valley polarized state is predicted depending on the value of the onsite Coulomb interaction. At fractional filling, the unscreened Coulomb interaction leads to a valley polarized Fractional Quantum Hall liquid which spontaneously breaks time reversal symmetry. Motivated by artificial graphene systems [5-8], we consider tuning the short range part of interactions, and demonstrate that exotic valley symmetric states, including a valley Fractional Topological Insulator and a spin triplet superconductor, can be stabilized by such interaction engineering.< Leer menos

Palabras clave en inglés

Quantum Hall effects

Electronic transport in graphene

Electronic structure of graphene

DOI

http://dx.doi.org/10.1103/PhysRevLett.108.266801

Proyecto europeo

TOPOLOGICAL EFFECTS IN MATTER WITH STRONG SPIN-ORBIT COUPLING

Proyecto ANR

Transport électronique dans les isolants topologiques - ANR-10-BLAN-0419

Orígen

Importado de Hal

Centros de investigación

Laboratoire Ondes et Matière d'Aquitaine (LOMA) - UMR 5798