Possible Tricritical Behavior and Anomalous Lattice Softening in van der Waals Itinerant Ferromagnet Fe(3)GeTe(2)under High Pressure

doi:10.1088/0256-307X/37/7/076202

	Possible Tricritical Behavior and Anomalous Lattice Softening in van der Waals Itinerant Ferromagnet Fe(3)GeTe(2)under High Pressure
	Xu, Jie-Min 2; Wang, Shu-Yang 1,2; Wang, Wen-Jun 1,2; Zhou, Yong-Hui 1,2; Chen, Xu-Liang 2; Yang, Zhao-Rong 2; Qu, Zhe 2
刊名	CHINESE PHYSICS LETTERS
	2020-06-01
卷号	37
关键词	62 50 -p 63 20 -e 78 30 -j 72 90 +y
ISSN号	0256-307X
DOI	10.1088/0256-307X/37/7/076202
通讯作者	Qu, Zhe(zhequ@hmfl.ac.cn)
英文摘要	We present a high-pressure study of van der Waals ferromagnetic metal Fe(3)GeTe(2)through electrical transport and Raman scattering measurements in diamond anvil cells at pressures up to 22.4GPa. Upon compression, the ferromagnetic transition temperatureT(c)manifested by a kink in resistance curve decreases monotonically and becomes undiscernable aroundP(c)= 10GPa, indicative of suppression of the itinerant ferromagnetism. Meanwhile, by fitting the low temperature resistance to the Fermi liquid behavior ofR=R-0+AT(2), we found thatR(0)shows a cusp-like anomaly and the coefficientAdiverges aroundP(c). These transport anomalies imply a tricritical point as commonly observed in itinerant ferromagnets under pressure. Unexpectedly, the Raman-activeE(2g)andA(1g)modes soften remarkably after an initial weak hardening and the peak widths of both modes broaden evidently on approachingP(c), followed by complete disappearance of both modes above this critical pressure. A possible underlying mechanism for such anomalous lattice softening nearP(c)is discussed.
资助项目	National Key Research and Development Program of China[2018YFA0305704] ; National Key Research and Development Program of China[2016YFA0401804] ; National Natural Science Foundation of China[11774352] ; National Natural Science Foundation of China[U1832214] ; National Natural Science Foundation of China[U19A2093] ; National Natural Science Foundation of China[11804344] ; National Natural Science Foundation of China[U1632275] ; National Natural Science Foundation of China[11874362] ; National Natural Science Foundation of China[11704387] ; National Natural Science Foundation of China[U1932152] ; Users with Excellence Project of Hefei Center CAS[2018HSC-UE012] ; Major Program of Development Foundation of Hefei Center for Physical Science and Technology[2018ZYFX002] ; Youth Innovation Promotion Association CAS[2020443]
WOS关键词	CRYSTAL ; STABILITY ; PHASE
WOS研究方向	Physics
语种	英语
出版者	IOP PUBLISHING LTD
WOS记录号	WOS:000553032400001
资助机构	National Key Research and Development Program of China ; National Natural Science Foundation of China ; Users with Excellence Project of Hefei Center CAS ; Major Program of Development Foundation of Hefei Center for Physical Science and Technology ; Youth Innovation Promotion Association CAS
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/70952]
专题	中国科学院合肥物质科学研究院
通讯作者	Qu, Zhe
作者单位	1.Univ Sci & Technol China, Grad Sch, Sci Isl Branch, Hefei 230026, Peoples R China 2.Chinese Acad Sci, Hefei Inst Phys Sci, High Field Magnet Lab, Anhui Key Lab Condensed Matter Phys Extreme Condi, Hefei 230031, Peoples R China
推荐引用方式 GB/T 7714	Xu, Jie-Min,Wang, Shu-Yang,Wang, Wen-Jun,et al. Possible Tricritical Behavior and Anomalous Lattice Softening in van der Waals Itinerant Ferromagnet Fe(3)GeTe(2)under High Pressure[J]. CHINESE PHYSICS LETTERS,2020,37.
APA	Xu, Jie-Min.,Wang, Shu-Yang.,Wang, Wen-Jun.,Zhou, Yong-Hui.,Chen, Xu-Liang.,...&Qu, Zhe.(2020).Possible Tricritical Behavior and Anomalous Lattice Softening in van der Waals Itinerant Ferromagnet Fe(3)GeTe(2)under High Pressure.CHINESE PHYSICS LETTERS,37.
MLA	Xu, Jie-Min,et al."Possible Tricritical Behavior and Anomalous Lattice Softening in van der Waals Itinerant Ferromagnet Fe(3)GeTe(2)under High Pressure".CHINESE PHYSICS LETTERS 37(2020).