On the nature of charge density waves, superconductivity and their interplay in 1T-TiSe₂ / Chuan Chen.
2019
QC176.8.E4
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Title
On the nature of charge density waves, superconductivity and their interplay in 1T-TiSe₂ / Chuan Chen.
Author
Chen, Chuan.
ISBN
9783030298258 (electronic book)
3030298256 (electronic book)
3030298256 (electronic book)
Published
Cham : Springer, 2019.
Language
English
Description
1 online resource (xvi, 105 pages) : illustrations.
Item Number
10.1007/978-3-030-29 doi
Call Number
QC176.8.E4
Dewey Decimal Classification
530.4/1
Summary
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.
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Includes bibliographical references.
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Source of Description
Online resource; title from PDF title page (SpringerLink, viewed October 3, 2019).
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Springer theses.
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Table of Contents
Introduction
Excitonic character of CDWin TiSe2
Phenomenological model of coexisting CDWand superconductivity in TiSe2
Excitonic CDWfluctuations and superconductivity
Anomalous quantum metal phase in TiSe2
Conclusions
Appendices.
Excitonic character of CDWin TiSe2
Phenomenological model of coexisting CDWand superconductivity in TiSe2
Excitonic CDWfluctuations and superconductivity
Anomalous quantum metal phase in TiSe2
Conclusions
Appendices.