Symmetry of surface states in graphene superlattices terminated with magnetic cap layers

H. Z. Xu; Q. Q. Yan; L. Y. Wang; H. L. Wang; S. S. Wang; Y. P. Zhang

doi:10.1007/s11082-021-03169-3

Symmetry of surface states in graphene superlattices terminated with magnetic cap layers

H. Z. Xu, Q. Q. Yan, L. Y. Wang, H. L. Wang, S. S. Wang, Y. P. Zhang

Department of Electrical and Electronic Engineering

Research output: Journal Publication › Article › peer-review

Abstract

The symmetry of surface states has been investigated with numerical calculations in graphene superlattices (SLs) terminated with magnetic cap layers. It is found that the surface states in SL of pure electric basis with cap layer of magnetic potential A_s≥ 0 are symmetric about the transverse wave vector k_y= 0 plane to those with A_s≤ 0. While those in SL of pure magnetic basis with the same cap layer of magnetic potential A_s are symmetric about the energy origin E= 0 plane. Additionally, the surface states in SL of general complex electric/magnetic basis show no symmetry. These interesting results will provide some important guidelines for the experimental exploration of carbon-based quantum electronic and optoelectronic devices.

Original language	English
Article number	548
Journal	Optical and Quantum Electronics
Volume	53
Issue number	9
DOIs	https://doi.org/10.1007/s11082-021-03169-3
Publication status	Published - Sept 2021

Keywords

Single layer graphene
Superlattice of complex basis
Surface states
Symmetry

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Atomic and Molecular Physics, and Optics
Electrical and Electronic Engineering

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10.1007/s11082-021-03169-3

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title = "Symmetry of surface states in graphene superlattices terminated with magnetic cap layers",

abstract = "The symmetry of surface states has been investigated with numerical calculations in graphene superlattices (SLs) terminated with magnetic cap layers. It is found that the surface states in SL of pure electric basis with cap layer of magnetic potential As≥ 0 are symmetric about the transverse wave vector ky= 0 plane to those with As≤ 0. While those in SL of pure magnetic basis with the same cap layer of magnetic potential As are symmetric about the energy origin E= 0 plane. Additionally, the surface states in SL of general complex electric/magnetic basis show no symmetry. These interesting results will provide some important guidelines for the experimental exploration of carbon-based quantum electronic and optoelectronic devices.",

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AU - Xu, H. Z.

AU - Yan, Q. Q.

AU - Wang, L. Y.

AU - Wang, H. L.

AU - Wang, S. S.

AU - Zhang, Y. P.

PY - 2021/9

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N2 - The symmetry of surface states has been investigated with numerical calculations in graphene superlattices (SLs) terminated with magnetic cap layers. It is found that the surface states in SL of pure electric basis with cap layer of magnetic potential As≥ 0 are symmetric about the transverse wave vector ky= 0 plane to those with As≤ 0. While those in SL of pure magnetic basis with the same cap layer of magnetic potential As are symmetric about the energy origin E= 0 plane. Additionally, the surface states in SL of general complex electric/magnetic basis show no symmetry. These interesting results will provide some important guidelines for the experimental exploration of carbon-based quantum electronic and optoelectronic devices.

AB - The symmetry of surface states has been investigated with numerical calculations in graphene superlattices (SLs) terminated with magnetic cap layers. It is found that the surface states in SL of pure electric basis with cap layer of magnetic potential As≥ 0 are symmetric about the transverse wave vector ky= 0 plane to those with As≤ 0. While those in SL of pure magnetic basis with the same cap layer of magnetic potential As are symmetric about the energy origin E= 0 plane. Additionally, the surface states in SL of general complex electric/magnetic basis show no symmetry. These interesting results will provide some important guidelines for the experimental exploration of carbon-based quantum electronic and optoelectronic devices.

KW - Single layer graphene

KW - Superlattice of complex basis

KW - Surface states

KW - Symmetry

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Symmetry of surface states in graphene superlattices terminated with magnetic cap layers

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Keywords

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