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Angle Resolved Photoemission Spectroscopy of Delafossite Metals

  • Book
  • © 2019

Overview

Authors:
  1. Veronika Sunko

    1. Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Dresden, Germany

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  • Nominated as an outstanding Ph.D. thesis by the Max Planck Insititute for Chemical Physics of Solids, Dresden, Germany
  • Describes the experimental and theoretical aspects of angle resolved photoemission, as well as the analysis of the resulting data, at the level useful to anyone aiming to understand the results of such experiments
  • Provides a didactic analysis of the mechanisms by which spin-splitting arises in solids
  • Explains how, and under which conditions, angle resolved photoemission can be sensitive to spin-spin correlations

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

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Table of contents (7 chapters)

  1. Front Matter

    Pages i-xvii
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  2. Introduction

    • Veronika Sunko
    Pages 1-19

  3. Angle Resolved Photoemission

    • Veronika Sunko
    Pages 21-68

  4. Theory and Models

    • Veronika Sunko
    Pages 69-76

  5. Bulk States in PtCoO\(_{2}\) and PdCoO\(_{2}\)

    • Veronika Sunko
    Pages 77-88

  6. Coupling of Metallic and Mott-Insulating States in PdCrO2

    • Veronika Sunko
    Pages 89-117

  7. Rashba-Like Spin-Split Surface States

    • Veronika Sunko
    Pages 119-175

  8. Conclusions and Outlook

    • Veronika Sunko
    Pages 177-178

  9. Back Matter

    Pages 179-198
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Keywords

About this book

This thesis describes the results of angle resolved photoemission spectroscopy experiments on delafossite oxide metals, and theoretical work explaining these observations. The study was motivated by the extraordinarily high conductivity of the non-magnetic delafossites PdCoO2 and PtCoO2, the measurement of whose electronic structure is reported and discussed. Two unexpected effects were observed in the course of the investigation; each is described and analysed in detail. Firstly, a previously unrecognised type of spectroscopic signal, allowing the non-magnetic probe of photoemission to become sensitive to spin-spin correlations, was observed in the antiferromagnetic PdCrO2. Its origin was identified as the Kondo-like coupling of itinerant and Mott insulating electrons. Furthermore, surface states exhibiting an unusually large Rashba-like spin-splitting were observed on the transition metal terminated surfaces of delafossites. The large inversion symmetry breaking energy scale, a consequence of the unusual structure of the surface layer, is identified as the origin of the effect.

Authors and Affiliations

  • Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Dresden, Germany

    Veronika Sunko

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