Dissertation/Thesis Abstract

The effect of strain on electronic structures of hybrid graphene-boron nitride monolayer superlattices
by Zhang, Shiqi, M.S., University of Wyoming, 2012, 55; 1512335
Abstract (Summary)

Since the discovery of graphene monolayers, a variety of 2D crystals have been explored both theoretically and experimentally. Most recently, domain-hybridized graphene and boron nitride (C-BN) monolayers have successfully been fabricated. Our research group has proposed a 2D superlattice monolayer consisting of well-aligned alternating graphene and boron nitride stripes and shown that this hetero-phase 2D crystalline monolayer is structurally very stable and electronically semiconducting. In this research, we further investigate the feasibility of tailoring the electronic property of C-BN monolayer superlattice by applying mechanical strain. Using the first-principles calculation based on density functional theory, we compute detailed electronic band structures of C-BN superlattices subject to mechanical strain, with respect to stripe width. The dramatic bandgap changes of armchair superlattices are presented and the mechanically tuned spin-polarized metallic properties of zigzag superlattices are demonstrated.

Indexing (document details)
Advisor: Jun, Sukky
Commitee: Fertig, Ray Stuart, III, Frick, Carl Pieter, Park, Gi-Hyeon
School: University of Wyoming
Department: Mechanical Engineering
School Location: United States -- Wyoming
Source: MAI 50/06M, Masters Abstracts International
Subjects: Mechanical engineering
Keywords: Band structure, Boron nitride monolayer, Electronic properties, Graphene, Spin properties, Superlattice monolayer
Publication Number: 1512335
ISBN: 978-1-267-39563-4
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