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Theoretical Studies of Some Two-Dimensional Materials

Abstract第3-4页
1 Introduction第9-33页
    1.1 Introduction of Two-Dimensional Material第11-20页
        1.1.1 Graphene第11-12页
        1.1.2 Hexagonal Boron Nitride (hBN)第12-14页
        1.1.3 Porous Graphene第14-15页
        1.1.4 Group IV Alkene第15-17页
        1.1.5 Transition Metal Halide CrI3第17-20页
    1.2 Physical properties of Two-dimensional materials第20-32页
        1.2.1 Gas separation第20-21页
        1.2.2 Magnetism第21-25页
        1.2.3 Topological Insulator and Quantum Spin Hall Effect第25-27页
        1.2.4 Chem Insulator and Quantum Anomalous Hall Effect第27-29页
        1.2.5 Multiferroics and Magnetoelectric Coupling第29-32页
    1.3 Summary第32-33页
2 Theoretical Basis and Calculation Method第33-50页
    2.1 First-Principles Calculation第34-43页
        2.1.1 Born-Oppenheimer Approximation and Hartree-Fock Approximation第34-36页
        2.1.2 Density Functional Theory (DFT)第36-39页
        2.1.3 Exchange Correlation Terms第39-41页
        2.1.4 Wave Function Expansion Method第41-43页
    2.2 Introduction to Monte-Carlo Simulation第43-48页
        2.2.1 Mathematical Basis of Monte-Carlo Simulation第43-44页
        2.2.2 The Spin Hamiltonian第44-47页
        2.2.3 Metropolis Algorithm第47-48页
    2.3 A Brief Introduction to the Software Package used in this Thesis第48页
    2.4 Summary第48-50页
3 Nucleation of Boron-Nitrogen on Transition Metal Surface: A First-PrinciplesInvestigation第50-58页
    3.1 Introduction第50-51页
    3.2 Models and Theoretical Methods第51页
    3.3 Results and Discussion第51-57页
    3.4 Conclusion第57-58页
4 Improved Ferromagnetism in 2D Alloy Transition Metal Halides Semiconductor第58-69页
    4.1 Introduction第58-59页
    4.2 Computational Methods第59-60页
    4.3 Structural properties of CrWI6 monolayer第60-61页
    4.4 Electronic and magnetic properties without SOC第61-64页
    4.5 SOC effect and magnetic anisotropy第64-65页
    4.6 Curie temperature第65-66页
    4.7 Strain effect and Interlayer magnetic coupling第66-68页
    4.8 Other 2D ferromagnetic alloy halides第68页
    4.9 Conclusions第68-69页
Acknowledgements第69-70页
References第70-79页
Publications第79页

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