1.

Record Nr.

UNINA9910523719003321

Autore

Kung H. H (Hsiang-hsi), <1880-1967, >

Titolo

Collective Excitations in the Antisymmetric Channel of Raman Spectroscopy / / by Hsiang-Hsi Kung

Pubbl/distr/stampa

Cham : , : Springer International Publishing : , : Imprint : Springer, , 2022

ISBN

9783030893323

9783030893316

Edizione

[1st ed. 2022.]

Descrizione fisica

1 online resource (165 pages)

Collana

Springer Theses, Recognizing Outstanding Ph.D. Research, , 2190-5061

Disciplina

535.846

Soggetti

Superconductivity

Superconductors

Spectrum analysis

Materials - Analysis

Crystallography

Spintronics

Lasers

Spectroscopy

Characterization and Analytical Technique

Crystallography and Scattering Methods

Laser

Lingua di pubblicazione

Inglese

Formato

Materiale a stampa

Livello bibliografico

Monografia

Nota di contenuto

Chapter 1. Introduction -- Chapter 2. Experimental setup -- Chapter 3. Raman scattering in URu2Si2 -- Chapter 4. Secondary emission in Bi2Se3 -- Chapter 5. Conclusion.

Sommario/riassunto

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. .