Persistence of the R3 m Phase in Powder GeTe at High Pressure and High Temperature

doi:10.1021/acs.jpcc.8b06511

	Persistence of the R3 m Phase in Powder GeTe at High Pressure and High Temperature
	Li, Yanchun; Cheng H(程虎); Zhang JR(张俊然); Li XD(李晓东); Peng, Feng; Li YC(李延春); Cheng, Hu; Zhang, Junran; Lin, Chuanlong; Li, Xiaodong
刊名	JOURNAL OF PHYSICAL CHEMISTRY C
	2018
卷号	122 期号:50 页码:28460-28465
ISSN号	1932-7447
DOI	10.1021/acs.jpcc.8b06511
文献子类	Article
英文摘要	As a phase-change material (PCM), rhombohedral GeTe (space group R3m) was believed to transform to the cubic rock salt phase (B1) at 3-4 GPa, associated with the disappearance of a Peierls distortion. However, using a combination of synchrotron X-ray diffraction and theoretical calculations, we found that the R3m phase persists from ambient pressure up to pressures of about 15.8 GPa, in contrast to previous reports. Neither was the B1 phase observed in a heating X-ray powder diffraction experiment. The spurious transformation from R3m to B1 is caused by changes to the compression ratio of lattice parameters in the R3m phase under high pressure/temperature. These findings provide insight into transitions of PCMs, relevant to other materials undergoing displacive transitions under high pressure/temperature.
WOS关键词	X-RAY-DIFFRACTION ; ELECTRICAL-PROPERTIES ; CRYSTAL-STRUCTURE ; II-VI ; TRANSITIONS ; HGTE ; PBSE ; PBTE ; CDTE
WOS研究方向	Chemistry ; Science & Technology - Other Topics ; Materials Science
语种	英语
WOS记录号	WOS:000454566700002
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/286868]
专题	高能物理研究所_多学科研究中心
通讯作者	Li YC(李延春)
作者单位	中国科学院高能物理研究所
推荐引用方式 GB/T 7714	Li, Yanchun,Cheng H,Zhang JR,et al. Persistence of the R3 m Phase in Powder GeTe at High Pressure and High Temperature[J]. JOURNAL OF PHYSICAL CHEMISTRY C,2018,122(50):28460-28465.
APA	Li, Yanchun.,程虎.,张俊然.,李晓东.,Peng, Feng.,...&Cheng, Hu, Zhang, Junran, Lin, Chuanlong, Li, Xiaodong, Peng, Feng, Li, Gong.(2018).Persistence of the R3 m Phase in Powder GeTe at High Pressure and High Temperature.JOURNAL OF PHYSICAL CHEMISTRY C,122(50),28460-28465.
MLA	Li, Yanchun,et al."Persistence of the R3 m Phase in Powder GeTe at High Pressure and High Temperature".JOURNAL OF PHYSICAL CHEMISTRY C 122.50(2018):28460-28465.