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On the Nature of Charge Density Waves, Superconductivity and Their Interplay in 1T-TiSe₂

  • Chuan Chen

Part of the Springer Theses book series (Springer Theses)

Table of contents

  1. Front Matter
    Pages i-xvi
  2. Chuan Chen
    Pages 1-14
  3. Chuan Chen
    Pages 15-29
  4. Chuan Chen
    Pages 83-85
  5. Back Matter
    Pages 87-105

About this book

Introduction

This thesis presents analytical theoretical studies on the interplay between charge density waves (CDW) and superconductivity (SC) in the actively studied transition-metal dichalcogenide 1T-TiSe2. It begins by reapproaching a years-long debate over the nature of the phase transition to the  commensurate CDW (CCDW) state and the role played by the intrinsic tendency towards excitonic condensation in this system.  A Ginzburg-Landau phenomenological theory was subsequently developed to understand the experimentally observed transition from commensurate to incommensurate CDW (ICDW) order with doping or pressure, and the emergence of a superconducting dome that coexists with ICDW. Finally, to characterize microscopically the effects of the interplay between CDW and SC, the spectrum of CDW fluctuations beyond mean-field was studied in detail. In the aggregate, the work reported here provides an encompassing understanding of what are possibly key microscopic underpinnings of the CDW and SC physics in TiSe2.   

Keywords

Charge Density Waves Superconductivity and charge density waves TiSe2 Transition Metal Dichalcognides Discommensuration Ginzburg-Landau theory CDW Fluctuations Excitonic condensation

Authors and affiliations

  • Chuan Chen
    • 1
  1. 1.Center for Advanced 2D MaterialsNational University of SingaporeSingaporeSingapore

Bibliographic information

  • DOI https://doi.org/10.1007/978-3-030-29825-8
  • Copyright Information Springer Nature Switzerland AG 2019
  • Publisher Name Springer, Cham
  • eBook Packages Physics and Astronomy
  • Print ISBN 978-3-030-29824-1
  • Online ISBN 978-3-030-29825-8
  • Series Print ISSN 2190-5053
  • Series Online ISSN 2190-5061
  • Buy this book on publisher's site