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**Harvard**

Bergvall, A. (2014) *Quantum Transport Theory in Graphene*. Göteborg : Chalmers University of Technology (Doktorsavhandlingar vid Chalmers tekniska högskola. Ny serie, nr: 3).

** BibTeX **

@book{

Bergvall2014,

author={Bergvall, Anders},

title={Quantum Transport Theory in Graphene},

isbn={978-91-7597-052-3},

abstract={In this thesis, we focus on different aspects of electron transport in nanostructured graphene (such as graphene nanoribbons). We
develop and implement numerical methods to study quantum coherent electron transport on an atomistic level, complemented by analytical
calculations based on the Dirac approximation valid close to the points $\vec{K}$ and $\vec{K}^\prime$ in the graphene Brillouin zone.
By simulating a graphene nanogap bridged with 1,4-phenylene-diamine molecules anchored via $C_{60}$ molecules, we show that a transistor
effect can be achieved by back-gating the system. By simulating STM-measurements on nanoribbons with single impurities, we investigate
the interplay between size quantization and the local scatterers, and show analytically how the features of the Fourier transformed
local density of states can be explained by electrons scattering between different transverse modes of the ribbons. We extend the analys to
also include analytical transport calculations, and explain the origin of characteristic dips found in the transmission and their relations
to quasi-bound states formed around the ribbon impurities. We construct and simulate graphene ribbons with transverse grain boundaries,
and illustrate how such grain boundaries form metallic states bridging the two edges of the ribbon together. This is a plausible candidate
to explain the attenuation (or even destruction) of the quantum Hall effect often seen in quantum Hall bar measurements, especially
with graphene grown on metals (such as copper) where grain boundaries are common. The introductory chapters also present a basic introduction
to the field of graphene and graphene ribbons, and we thoroughly present the tight-binding techniques used for simulation.},

publisher={Institutionen för mikroteknologi och nanovetenskap, Tillämpad kvantfysik, Chalmers tekniska högskola,},

place={Göteborg},

year={2014},

series={Doktorsavhandlingar vid Chalmers tekniska högskola. Ny serie, no: 3},

keywords={graphene, nanoribbons, quantum coherent electron transport, tight-binding, grain boundaries, FT-LDOS},

}

** RefWorks **

RT Dissertation/Thesis

SR Electronic

ID 200837

A1 Bergvall, Anders

T1 Quantum Transport Theory in Graphene

YR 2014

SN 978-91-7597-052-3

AB In this thesis, we focus on different aspects of electron transport in nanostructured graphene (such as graphene nanoribbons). We
develop and implement numerical methods to study quantum coherent electron transport on an atomistic level, complemented by analytical
calculations based on the Dirac approximation valid close to the points $\vec{K}$ and $\vec{K}^\prime$ in the graphene Brillouin zone.
By simulating a graphene nanogap bridged with 1,4-phenylene-diamine molecules anchored via $C_{60}$ molecules, we show that a transistor
effect can be achieved by back-gating the system. By simulating STM-measurements on nanoribbons with single impurities, we investigate
the interplay between size quantization and the local scatterers, and show analytically how the features of the Fourier transformed
local density of states can be explained by electrons scattering between different transverse modes of the ribbons. We extend the analys to
also include analytical transport calculations, and explain the origin of characteristic dips found in the transmission and their relations
to quasi-bound states formed around the ribbon impurities. We construct and simulate graphene ribbons with transverse grain boundaries,
and illustrate how such grain boundaries form metallic states bridging the two edges of the ribbon together. This is a plausible candidate
to explain the attenuation (or even destruction) of the quantum Hall effect often seen in quantum Hall bar measurements, especially
with graphene grown on metals (such as copper) where grain boundaries are common. The introductory chapters also present a basic introduction
to the field of graphene and graphene ribbons, and we thoroughly present the tight-binding techniques used for simulation.

PB Institutionen för mikroteknologi och nanovetenskap, Tillämpad kvantfysik, Chalmers tekniska högskola,

T3 Doktorsavhandlingar vid Chalmers tekniska högskola. Ny serie, no: 3

LA eng

LK http://publications.lib.chalmers.se/records/fulltext/200837/200837.pdf

OL 30