Chiral excitations and the intermediate-field regime in the Kitaev magnet α - RuCl3

被引：1

作者：

Sahasrabudhe, Anuja ^{[1
]}

Prosnikov, Mikhail A. ^{[2
]}

Koethe, Thomas C. ^{[1
]}

Stein, Philipp ^{[1
]}

Tsurkan, Vladimir ^{[3
,4
]}

Loidl, Alois ^{[3
]}

Grueninger, Markus ^{[1
]}

Hedayat, Hamoon ^{[1
]}

Loosdrecht, Paul H. M. van ^{[1
]}

机构：

[1] Univ Cologne, Inst Phys 2, D-50937 Cologne, Germany

[2] Radboud Univ Nijmegen, High Field Magnet Lab HFML EMFL, NL-6525 ED Nijmegen, Netherlands

[3] Univ Augsburg, D-86159 Augsburg, Germany

[4] Inst Appl Phys, MD-2028 Kishinev, Moldova

来源：

PHYSICAL REVIEW RESEARCH | 2024年 / 6卷 / 02期

关键词：

RAMAN OPTICAL-ACTIVITY; QUANTUM;

D O I：

10.1103/PhysRevResearch.6.L022005

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

In the Kitaev magnet alpha-RuCl3, the existence of a magnetic-field-induced quantum spin-liquid phase and of anyonic excitations is controversially discussed. We address this elusive, exotic phase via helicity-dependent Raman scattering and analyze the Raman optical activity of excitations as a function of magnetic field and temperature. The hotly debated field regime between 7.5 and 10.5 T is characterized by clear spectroscopic signatures such as a plateau of the Raman optical activity of the dominant, chiral spin-flip excitation. This provides direct evidence for the existence of a distinct intermediate-field regime with an intriguing ground state featuring chiral excitations.

引用

页数：6

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