Spin-phonon coupling in van der Waals antiferromagnet VOCl*

被引：4

作者：

Wang, Wen-Jun ^{[1
,2
]}

Xu, Xi-Tong ^{[1
,3
]}

Shen, Jie ^{[1
,2
]}

Wang, Zhe ^{[1
,2
]}

Zhang, Shi-Le ^{[1
]}

Qu, Zhe ^{[1
,3
]}

机构：

[1] Chinese Acad Sci, Hefei Inst Phys Sci, High Field Magnet Lab, Anhui Prov Key Lab Condensed Matter Phys Extreme, Hefei 230031, Peoples R China

[2] Univ Sci & Technol China, Sci Isl Branch, Grad Sch, Hefei 230026, Peoples R China

[3] Chinese Acad Sci, Hefei Inst Phys Sci, CAS Key Lab Photovolta & Energy Conservat Mat, Hefei 230031, Peoples R China

来源：

CHINESE PHYSICS B | 2021年 / 30卷 / 10期

基金：

中国国家自然科学基金;

关键词：

vdW material; 2D magnetism; Raman spectroscopy; spin-phonon coupling; MAGNETISM; FERROMAGNETISM; FLUCTUATIONS; BEHAVIOR; METALS;

D O I：

10.1088/1674-1056/ac041f

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report magnetization and Raman spectroscopy study on single crystals of VOCl, a van der Waals antiferromagnetic material. Magnetization measurement confirms an antiferromagnetic transition at 79 K and a magnetic easy axis along crystallographic a direction. The temperature-dependent Raman spectrum reveals five peaks at 30 K. Below the Neel temperature T (N), the Raman-active modes 247 cm(-1) and 404 cm(-1) remarkably deviate from the standard Boltzmann function, which is ascribed to the strong magnetoelastic coupling between spins and phonons. We further observe an anomaly in 383 cm(-1) mode at around 150 K. This coincides with the broad maximum in VOCl's magnetic susceptibility, suggesting a development of short-ranged magnetic order at this temperature.

引用

页数：5

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