声明
Abstract
Table of Content
List of Figures
List of Symbols and Abbreviations
Chapter 1 Introduction
1.1 Introduction to Mesoscopic Transport
1.2 Electronic Properties of Graphene
1.2.1 Hybridizations of Carbon Atoms in Graphene
1.2.2 Basic Properties of Graphene
1.2.3 Klein Tunneling in Graphene
1.2.4 Half Integer Quantum Hall Effect in Graphene
1.3 Brief Introduction to Spintronics
1.3.1 The Development of Spintronics
1.3.2 Graphene’s Advantage for Spintronies
1.4 Organization of This Thesis
References
Chapter 2 Theoretical Formalisms for Quantum Transport
2.1 Scattering Matrix Theory
2.1.1 Definition of The Scattering Matrix
2.1.2 Combination of Scattering Matrices
2.1.3 Transmission Probability and Landauer-BüttikerFormula
2.2 Transfer Matrix
2.2.1 Definition of Transfer Matrix
2.2.2 Instability of Transfer Matrix
2.3 Green’s Function Formalism
2.3.1 Two-Dimensional Tight-Binding Models
2.3.2 Green's Function Formalism
2.3.3 Application of Green’s Function to Graphene Nanoribbons
References
Chapter 3 Spin-Polarized Quantum Pumping in Monolayer Graphene
3.1 Introduction to Quantum Pumping
3.2 Theory for Quantum Pumping in Graphene
3.2.1 General Formalism for Quantum Pumping
3.2.2 Scattering Matrix in Graphene
3.3 Theoretical Model for Spin-Polarized Quantum Pumping
3.4 Spin Current Generation by Adiabatic Weak Pumping
3.5 Generation of Large Spin Current in Graphene
3.6 Conclusion
References
Chapter 4 Pure Spin Current Generation by Quantum Pumping
4.1 Introduction
4.2 Theontical Model
4.3 Results and Discussion
4.4 Conclusion
References
Chapter 5 Spin Transport in Graphene Spin-Orbit Barrier Structure
5.1 Introduction to Spin Orbit Interaction
5.1.1 Spin Orbit Interaction in Conventional 2DEG
5.1.2 Spin Orbit Interaction in Graphene
5.2 Kane and Mele Model
5.3 Energy Band Structure and Spin Direction
5.4 Theoretical Model and Formalism
5.5 Numerical Results and Discussion
5.6 Conclusion
References
Chapter 6 Spin Polarization Switching in Monolayer Graphene through a Rashba Multi-Barrier Structure
6.1 Introduction
6.2 Model and Theory
6.2.1 Theoretical Model
6.2.2 The Scattering Matrix for Multi-RSOI Barrier Structure
6.3 Results and Discussion
6.4 Conclusion
References
Chapter 7 Conclusion and Future Work
7.1 Conclusion
7.2 Future Work
7.2.1 Introduction
7.2.2 Theoretical Formalism
7.2.3 Theoretical Model and Preliminary Results
References
Acknowledgements
List of Publications
Conferences
摘要