Broken sublattice symmetry states in Bernal stacked multilayer graphene

Chiho Yoon; Yunsu Jang; Jeil Jung; Hongki Min

doi:10.1088/2053-1583/aa659a

Broken sublattice symmetry states in Bernal stacked multilayer graphene

Chiho Yoon, Yunsu Jang, Jeil Jung, Hongki Min

Department of Physics

Seoul National University

Research output: Contribution to journal › Article › peer-review

6 Scopus citations

Abstract

We analyze the ordered phases of Bernal stacked multilayer graphene in the presence of interaction induced band gaps due to sublattice symmetry breaking potentials, whose solutions can be analyzed in terms of light-mass and heavy-mass pseudospin doublets which have the same Chern numbers but opposite charge polarization directions. The application of a perpendicular external electric field reveals an effective Hund’s rule for the ordering of the sublattice pseudospin doublets in a tetralayer, while a similar but more complex phase diagram develops with increasing layer number.

Original language	English
Article number	021025
Journal	2D Materials
Volume	4
Issue number	2
DOIs	https://doi.org/10.1088/2053-1583/aa659a
State	Published - Jun 2017

Keywords

Electron–electron interactions
Multilayer graphene
Ordered states

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abstract = "We analyze the ordered phases of Bernal stacked multilayer graphene in the presence of interaction induced band gaps due to sublattice symmetry breaking potentials, whose solutions can be analyzed in terms of light-mass and heavy-mass pseudospin doublets which have the same Chern numbers but opposite charge polarization directions. The application of a perpendicular external electric field reveals an effective Hund{\textquoteright}s rule for the ordering of the sublattice pseudospin doublets in a tetralayer, while a similar but more complex phase diagram develops with increasing layer number.",

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AU - Jung, Jeil

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AB - We analyze the ordered phases of Bernal stacked multilayer graphene in the presence of interaction induced band gaps due to sublattice symmetry breaking potentials, whose solutions can be analyzed in terms of light-mass and heavy-mass pseudospin doublets which have the same Chern numbers but opposite charge polarization directions. The application of a perpendicular external electric field reveals an effective Hund’s rule for the ordering of the sublattice pseudospin doublets in a tetralayer, while a similar but more complex phase diagram develops with increasing layer number.

KW - Electron–electron interactions

KW - Multilayer graphene

KW - Ordered states

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ER -

Broken sublattice symmetry states in Bernal stacked multilayer graphene

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