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Nominated as an outstanding Ph.D. thesis by the University of Lancaster, UK
Provides a general theoretical approach to understand the electronic properties of graphene heterostructures
Experimentally measurable quantities are calculated and discussed with the aid of numerous detailed figures
Each chapter represents a significant scientific advance and has an appropriate introduction and conclusion
The last decade has witnessed the discovery of, and dramatic progress in understanding the physics of graphene and related two-dimensional materials. The development of methods for manufacturing and aligning high-quality two-dimensional crystals has facilitated the creation of a new generation of materials: the heterostructures of graphene with hexagonal crystals, in which the graphene electrons acquire new, qualitatively different properties. This thesis provides a comprehensive theoretical framework in which to understand these heterostructures, based on the tight binding model, perturbation theory, group theory and the concept of the moire superlattice (all of which are elucidated). It explains how graphene heterostructures provide new opportunities for tailoring band structure, such as creating additional Dirac points or opening band gaps, and how they manifest themselves in transport measurements, optical absorption spectra and the fractal Hofstadter spectra. Also considered are the heterostructures of bilayer graphene and resonant tunneling in aligned graphene/insulator/graphene devices.
Content Level »Research
Keywords »Bilayer Graphene - Boron Nitride and Graphene Heterostructure - Graphene Heterostrucures - Graphene on Hexagonal Crystal - Hofstadter's Buterfly - Magnetic Miniband Structure - Moire Pattern - Moire Superlattice - Optical Absorption in Graphene Heterostructure - Resonant Tunnelling