Possible structural transformation and enhanced magnetic fluctuations in exfoliated α-RuCl3

被引：55
|
作者：
Zhou, Boyi [1 ]
Wang, Yiping [2 ]
Osterhoudt, Gavin B. [2 ]
Lampen-Kelley, Paula [3 ]
Mandrus, David [3 ,4 ]
He, Rui [5 ]
Burch, Kenneth S. [2 ]
Henriksen, Erik A. [1 ,6 ]
机构：
[1] Washington Univ, Dept Phys, 1 Brookings Dr, St Louis, MO 63130 USA
[2] Boston Coll, Dept Phys, 140 Commonwealth Ave, Chestnut Hill, MA 02467 USA
[3] Oak Ridge Natl Lab, Mat Sci & Technol Div, Oak Ridge, TN 37831 USA
[4] Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA
[5] Texas Tech Univ, Dept Elect & Comp Engn, Lubbock, TX 79409 USA
[6] Washington Univ, Inst Mat Sci & Engn, 1 Brookings Dr, St Louis, MO 63130 USA
来源：
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS | 2019年 / 128卷 / 291-295期
基金：
美国国家科学基金会;
关键词：
Magnetic materials; Raman spectroscopy; Phonons; RAMAN-SCATTERING; SPIN; GRAPHENE;
D O I：
10.1016/j.jpcs.2018.01.026
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
We present Raman spectroscopy experiments on exfoliated alpha-RuCl3, from tens of nm thick down to single layers. Besides unexpectedly finding this material to be air stable, in the thinnest layers we observe the appearance with decreasing temperature of a symmetry-forbidden mode in crossed polarization, along with an anomalous broadening of a mode at 164 cm(-1) that is known to couple to a continuum of magnetic excitations. This may be due to an enhancement of magnetic fluctuations and evidence for a distorted honeycomb lattice in single- and bilayer samples.
引用
收藏
页码：291 / 295
页数：5
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