Lattice dynamics and phase transitions in Fe3-xGeTe2

被引：24
作者：
Milosavljevic, A. [1 ]
Solajic, A. [1 ]
Djurdjic-Mijin, S. [1 ]
Pesic, J. [1 ]
Visic, B. [1 ]
Liu, Yu [2 ]
Petrovic, C. [2 ]
Lazarevic, N. [1 ]
Popovic, Z., V [1 ,3 ]
机构：
[1] Univ Belgrade, Ctr Solid State Phys & New Mat, Inst Phys Belgrade, Pregrevica 118, Belgrade 11080, Serbia
[2] Brookhaven Natl Lab, Condensed Matter Phys & Mat Sci Dept, Upton, NY 11973 USA
[3] Serbian Acad Arts & Sci, Knez Mihailova 35, Belgrade 11000, Serbia
来源：
PHYSICAL REVIEW B | 2019年 / 99卷 / 21期
基金：
欧盟地平线“2020”;
关键词：
CRYSTAL; FERROMAGNETISM;
D O I：
10.1103/PhysRevB.99.214304
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We present Raman spectroscopy measurements of the van der Waals bonded ferromagnet Fe3-xGeTe2, together with lattice dynamics. Four out of eight Raman active modes are observed and assigned, in agreement with numerical calculations. The energies and linewidths of the observed modes display an unconventional temperature dependence at about 150 and 220 K, followed by the nonmonotonic evolution of the Raman continuum. Whereas the former can be related to the magnetic phase transition, the origin of the latter anomaly remains an open question.
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页数：7
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