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

doi:10.1103/PhysRevLett.108.266801

Métadonnées

Licence d’utilisation du document

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]

Langue

Article de revue

Ce document a été publié dans

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

American Physical Society

Résumé en anglais

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.< Réduire

Mots clés en anglais

Quantum Hall effects

Electronic transport in graphene

Electronic structure of graphene

DOI

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

Projet Européen

TOPOLOGICAL EFFECTS IN MATTER WITH STRONG SPIN-ORBIT COUPLING

Project ANR

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

Origine

Importé de hal

Unités de recherche

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