Spatially indirect exciton condensate phases in double bilayer graphene

Jung-Jung Su and Allan H. MacDonald
Phys. Rev. B 95, 045416 – Published 18 January 2017

Abstract

We present a theory of spatially indirect exciton condensate states in systems composed of a pair of electrically isolated Bernal graphene bilayers. The ground-state phase diagram in a two-dimensional displacement-field/inter-bilayer-bias space includes layer-polarized semiconductors, spin-density-wave states, exciton condensates, and states with mixed excitonic and spin order. We find that two different condensate states, distinguished by a chirality index, are stable under different electrical control conditions.

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  • Received 12 April 2016
  • Revised 18 November 2016

DOI:https://doi.org/10.1103/PhysRevB.95.045416

©2017 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Jung-Jung Su1,* and Allan H. MacDonald2,†

  • 1Department of Electrophysics, National Chiao Tung University, Hsinchu 300, Taiwan
  • 2Department of Physics and Center for Complex Quantum Systems, University of Texas at Austin, Austin, Texas 78712, USA

  • *jungjsu@nctu.edu.tw
  • macd@physics.utexas.edu

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Issue

Vol. 95, Iss. 4 — 15 January 2017

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