Electric Polarization and End States in Boron Nitride Nanoribbons

ORAL

Abstract

Using first-principles calculations, we find that armchair BNNRs have an intrinsic electric polarization along the periodic direction for different ribbon widths. Like finite-length armchair graphene nanoribbons, finite-length armchair BNNRs also have end states at their zigzag ends. We are able to classify the end states by applying an electric field to offset the intrinsic polarization in BNNRs. We calculate the Zak phase of armchair BNNRs (whose unit cells do not have inversion or mirror symmetry) as a function of the width of the ribbon. We also study the relation between the Zak phase and the existence of end states.

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Presenters

  • Fangzhou Zhao

    Physics Department, UC Berkeley and Lawrence Berkeley National Lab

Authors

  • Fangzhou Zhao

    Physics Department, UC Berkeley and Lawrence Berkeley National Lab

  • Ting Cao

    University of California, Berkeley, Physics Department, UC Berkeley and Lawrence Berkeley National Lab, Physics, University of California - Berkeley

  • Yea-Lee Lee

    Physics Department, UC Berkeley and Lawrence Berkeley National Lab

  • Steven Louie

    Physics, University of California, Berkeley, University of California, Berkeley, Physics, Univ of California - Berkeley, Univ of California - Berkeley, Physics, UC Berkeley, Physics Department, UC Berkeley and Lawrence Berkeley National Lab, Department of Physics, University of California at Berkeley and Materials Sciences Division, Lawrence Berkeley National Laboratory, Department of Physics, University of California, Berkeley, Physics Department, University of California Berkeley and Lawrence Berkeley National Lab, Department of physics, University of California - Berkeley, Lawrence Berkeley National Lab and University of California - Berkeley, Materials Sciences Division, Lawrence Berkeley National Laboratory & Department of Physics, University of California at Berkeley, UC Berkeley and Lawrence Berkeley National Lab, Physics, University of California - Berkeley