Valley-Hall Kink and Edge States in Multilayer Graphene

By Jeil Jung, Fan Zhang, Z. Qiao, Allan H. MacDonald. 2011

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Department of Physics, University of Texas at Austin, USA(Dated: May 19, 2011)We report on a theoretical study of one-dimensional (1D) states localized at few-layer graphene system ribbonedges, and at interfaces between few-layer graphene systems with different valley Hall conductivities. These 1Dstates are topologically protected when valley mixing is neglected. We address the influence on their propertiesof stacking arrangement, interface structure, and external electric field perpendicular to the layers. We findthat 1D states are generally absent at multilayer ribbon armchair direction edges, but present irrespective ofcrystallographic orientation at any internal valley-Hallinterface of an ABC stacked multilayer.I. INTRODUCTION

Subfields: Atomic and Molecular Physics, and Optics, Materials Chemistry

View Paper: https://www.semanticscholar.org/paper/7e0184225eb2e14c1c798e680221eb0330182944