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Optical Properties of Bismuth-Based Topological Insulators

  • Book
  • © 2014

Overview

Authors:
  1. Paola Di Pietro

    1. INSTM UdR Trieste-ST Area Science Park, Trieste, Italy

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  • Selected as best Materials Science PhD Thesis by the University of Rome - Sapienza
  • Reports the occurrence of two dimensional surface plasmons attributed to massless Dirac fermions at the insulator surface
  • Provides a comparison, obtained through FTIR spectroscopy, of the optical conductivity of Bi-based thin films and single crystals
  • Includes a comprehensive review of the fascinating properties of topological insulators with a particular emphasis on their optical behavior
  • Includes supplementary material: sn.pub/extras

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

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Table of contents (3 chapters)

  1. Front Matter

    Pages i-x
    Download chapter PDF

  2. Introduction to the Topological Insulators and State of the Art

    • Paola Di Pietro
    Pages 1-46

  3. Experimental Technique, Sample Fabrication and Models for Data Analysis

    • Paola Di Pietro
    Pages 47-89

  4. Results and Analysis

    • Paola Di Pietro
    Pages 91-119
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Keywords

About this book

Topological Insulators (TIs) are insulators in the bulk, but have exotic metallic states at their surfaces. The topology, associated with the electronic wavefunctions of these systems, changes when passing from the bulk to the surface. This work studies, by means of infrared spectroscopy, the low energy optical conductivity of Bismuth based TIs in order to identify the extrinsic charge contribution of the bulk and to separate it from the intrinsic contribution of the surface state carriers. The extensive results presented in this thesis definitely shows the 2D character of the carriers in Bismuth-based topological insulators. The experimental apparatus and the FTIR technique, the theory of optical properties and Surface Plasmon Polaritons, as well as sample preparation of both crystals and thin films, and the analysis procedures are thoroughly described.

Authors and Affiliations

  • INSTM UdR Trieste-ST Area Science Park, Trieste, Italy

    Paola Di Pietro

About the author

Dr. Paola Di Pietro received both her three-year (2006) and her Master (2009, with highest marks) degrees in Physics from "Sapienza" University of Rome. She has five journal publications to her name, one of which in Nature Nanotechnology, with another article soon to come. She is currently affiliated to INSTM UdR Trieste-ST Area Science Park, Trieste, Italy. Her PhD thesis was nominated as the best in Materials Science.

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