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Strong and Weak Topology Probed by Surface Science

Topological Insulator Properties of Phase Change Alloys and Heavy Metal Graphene

  • Book
  • © 2015

Overview

Authors:
  1. Christian Pauly

    1. 2nd Physical Institute B, RWTH Aachen University, Aachen, Germany

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  • Publication in the field of natural sciences

Part of the book series: MatWerk (MW)

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Table of contents (6 chapters)

  1. Front Matter

    Pages I-VIII
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  2. Introduction

    • Christian Pauly
    Pages 1-4

  3. Fundamentals of Topological Insulators

    • Christian Pauly
    Pages 5-40

  4. Experimental Methods

    • Christian Pauly
    Pages 41-57

  5. Identification of Tellurium based Phase-Change Materials as Strong Topological Insulators

    • Christian Pauly
    Pages 59-103

  6. Weak Topological Insulator

    • Christian Pauly
    Pages 105-142

  7. Summary

    • Christian Pauly
    Pages 143-144

  8. Back Matter

    Pages 145-166
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Keywords

About this book

Christian Pauly demonstrates the strong topological properties of the technologically relevant phase change materials Sb2Te3 and Ge2Sb2Te5 by using two powerful techniques for mapping the surface electronic structure: scanning tunneling spectroscopy (STS) and angle-resolved photoemission spectroscopy (ARPES). In the case of a phase change material, this opens up the possibility of switching between an insulating amorphous and a conducting topological phase on nanosecond-time scales. Moreover, the author presents first experimental results of a weak topological insulator, namely on the bismuth-based graphene-like sheet system Bi14Rh3I9, revealing a topologically protected one-dimensional edge channel as its fingerprint. The edge state is as narrow as 0.8 nm, making it extremely attractive to device physics. Those strong and weak topological insulators are a new phase of quantum matter giving rise to robust boundary states which are protected from backscattering and localization.

Authors and Affiliations

  • 2nd Physical Institute B, RWTH Aachen University, Aachen, Germany

    Christian Pauly

About the author

Christian Pauly is working as a postdoc in the II. Institute of physics B of the RWTH Aachen University. His work focuses on the study of the topological properties of graphene-like sheet systems which belong to the class of weak topological insulators.

Bibliographic Information

  • Book Title: Strong and Weak Topology Probed by Surface Science

  • Book Subtitle: Topological Insulator Properties of Phase Change Alloys and Heavy Metal Graphene

  • Authors: Christian Pauly

  • Series Title: MatWerk

  • DOI: https://doi.org/10.1007/978-3-658-11811-2

  • Publisher: Springer Wiesbaden

  • eBook Packages: Biomedical and Life Sciences, Biomedical and Life Sciences (R0)

  • Copyright Information: Springer Fachmedien Wiesbaden 2015

  • Softcover ISBN: 978-3-658-11810-5Published: 30 January 2016

  • eBook ISBN: 978-3-658-11811-2Published: 22 January 2016

  • Series ISSN: 2522-0756

  • Series E-ISSN: 2522-0764

  • Edition Number: 1

  • Number of Pages: VIII, 166

  • Number of Illustrations: 24 b/w illustrations, 53 illustrations in colour

  • Topics: Solid State Physics, Nanoscale Science and Technology, Spectroscopy and Microscopy

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