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.
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页数：6
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