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Probing the Response of Two-Dimensional Crystals by Optical Spectroscopy

  • Book
  • © 2016

Overview

Authors:
  1. Yilei Li

    1. Department of Physics, Columbia University, New York, USA

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  • Nominated by Columbia University as an outstanding PhD Thesis
  • Provides convenient characterization tools for atomically thin transition metal dichalcogenides and their application in opto-electronic devices
  • Enhances our understanding of valley electronic states and opens up new opportunities for valleytronic applications using 2D materials
  • Includes supplementary material: sn.pub/extras

Part of the book series: Springer Theses (Springer Theses)

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Table of contents (8 chapters)

  1. Front Matter

    Pages i-xii
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  2. Introduction and Background

    • Yilei Li
    Pages 1-8

  3. Intrinsic Doping Dependence of Raman 2D Mode in Graphene: Signatures of Electron–Electron Interaction

    • Yilei Li
    Pages 9-18

  4. Coupling of Strongly Localized Graphene Plasmons to Molecular Vibrations

    • Yilei Li
    Pages 19-28

  5. Dielectric Response of a Thin Sheet

    • Yilei Li
    Pages 29-32

  6. Measurement of the Optical Dielectric Function of Monolayer Transition Metal Dichalcogenides: MoS2, MoSe2, WS2, and WSe2

    • Yilei Li
    Pages 33-43

  7. Measurement of the Second-Order Nonlinear Susceptibility and Probing Symmetry Properties of Few-Layer MoS2 and h-BN by Optical Second-Harmonic Generation

    • Yilei Li
    Pages 45-54

  8. Valley Splitting and Polarization by Zeeman Effect in Monolayer MoSe2

    • Yilei Li
    Pages 55-64

  9. Conclusion and Prospect

    • Yilei Li
    Pages 65-65

  10. Back Matter

    Pages 67-69
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Keywords

About this book

This thesis focuses on the study of the optical response of new atomically thin two-dimensional crystals, principally the family of transition metal dichalcogenides like MoS2. One central theme of the thesis is the precise treatment of the linear and second-order nonlinear optical susceptibilities of atomically thin transition metal dichalcogenides. In addition to their significant scientific interest as fundamental material responses, these studies provide essential knowledge and convenient characterization tools for the application of these 2D materials in opto-electronic devices. Another important theme of the thesis is the valley physics of atomically thin transition metal dichalcogenides. It is shown that the degeneracy in the valley degree of freedom can be lifted and a valley polarization can be created using a magnetic field, which breaks time reversal symmetry in these materials. These findings enhance our basic understanding of the valley electronic states and open up new opportunities for valleytronic applications using two-dimensional materials.

Authors and Affiliations

  • Department of Physics, Columbia University, New York, USA

    Yilei Li

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