Fractional Topological Phases and Broken Time-Reversal Symmetry in Strained Graphene
GHAEMI, Pouyan
Department of Physics
Department of Physics [Berkeley]
Materials Science Division [LBNL Berkeley]
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]
See more >
Department of Physics [Berkeley]
Max-Planck-Institut für Physik komplexer Systeme [MPI-PKS]
Laboratoire Ondes et Matière d'Aquitaine [LOMA]
GHAEMI, Pouyan
Department of Physics
Department of Physics [Berkeley]
Materials Science Division [LBNL Berkeley]
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]
< Reduce
Department of Physics [Berkeley]
Max-Planck-Institut für Physik komplexer Systeme [MPI-PKS]
Laboratoire Ondes et Matière d'Aquitaine [LOMA]
Language
en
Article de revue
This item was published in
Physical Review Letters. 2012, vol. 108, n° 26, p. 266801
American Physical Society
English Abstract
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 ...Read more >
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.Read less <
English Keywords
Quantum Hall effects
Electronic transport in graphene
Electronic structure of graphene
European Project
TOPOLOGICAL EFFECTS IN MATTER WITH STRONG SPIN-ORBIT COUPLING
ANR Project
Transport électronique dans les isolants topologiques - ANR-10-BLAN-0419
Origin
Hal imported