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Collective Excitations in the Antisymmetric Channel of Raman Spectroscopy

Hsiang-Hsi Kung

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English
Springer Nature Switzerland AG
09 December 2022
Series: Springer Theses
This thesis contains three breakthrough results in condensed matter physics. Firstly, broken reflection symmetry in the hidden-order phase of the heavy-fermion material URu2Si2 is observed for the first time. This represents a significant advance in the understanding of this enigmatic material which has long intrigued the condensed matter community due to its emergent long range order exhibited at low temperatures (the so-called “hidden order”). Secondly and thirdly, a novel collective mode (the chiral spin wave) and a novel composite particle (the chiral exciton) are discovered in the three dimensional topological insulator Bi2Se3. This opens up new avenues of possibility for the use of topological insulators in photonic, optoelectronic, and spintronic devices. These discoveries are facilitated by using low-temperature polarized Raman spectroscopy as a tool for identifying optically excited collective modes in strongly correlated electron systems and three-dimensional topological insulators.  
By:  
Imprint:   Springer Nature Switzerland AG
Country of Publication:   Switzerland
Edition:   2022 ed.
Dimensions:   Height: 235mm,  Width: 155mm, 
Weight:   267g
ISBN:   9783030893347
ISBN 10:   3030893340
Series:   Springer Theses
Pages:   151
Publication Date:  
Audience:   Professional and scholarly ,  Undergraduate
Format:   Paperback
Publisher's Status:   Active
Chapter 1. Introduction.- Chapter 2. Experimental setup.- Chapter 3. Raman scattering in URu2Si2.- Chapter 4. Secondary emission in Bi2Se3.- Chapter 5. Conclusion.

Hsiang-Hsi (Sean) Kung is a postdoctoral researcher at the Quantum Matter Institute at the University of British Columbia. He received his PhD from Rutgers University in 2018.

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