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2022 | OriginalPaper | Chapter

3. Raman Scattering in URu₂Si₂

Author : Hsiang-Hsi Kung

Published in: Collective Excitations in the Antisymmetric Channel of Raman Spectroscopy

Publisher: Springer International Publishing

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Abstract

In this chapter, I will introduce our Raman scattering study of the “hidden order” (HO) and antiferromagnetic (AFM) phases in URu₂Si₂, a heavy fermion material of undiminished interest in the condensed matter community for over thirty years. I will first give a short overview on the heavy fermion physics and the exotic phases in this compound, where focus will be given on the experimental results [Sect. 3.1]. Then I will describe typical sample preparation and characterization procedures, which are particularly important for detecting the electronic phases in URu₂Si₂ [Sect. 3.2]. In Sect. 3.3, I will present our Raman spectroscopic results in the pristine and Fe substituted URu_2−xFe_xSi₂ samples, which are fully consistent with a minimal model that explains the origin of the unusual A_2g susceptibility in URu₂Si₂ [Sect. 3.4]. We will also discuss the origin of the collective mode in the ordered phase at low temperature and the interrelation between the HO and AFM phases.

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Title: Raman Scattering in URu2Si2
Author: Hsiang-Hsi Kung
Publisher: Springer International Publishing
Book: Collective Excitations in the Antisymmetric Channel of Raman Spectroscopy
Print ISBN: 978-3-030-89331-6

Electronic ISBN: 978-3-030-89332-3

Copyright Year: 2022
DOI: https://doi.org/10.1007/978-3-030-89332-3_3

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