Two-coupled structural modulations in charge-density-wave state of SrPt2As2 superconductor

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	Two-coupled structural modulations in charge-density-wave state of SrPt2As2 superconductor
	Wang, L ; Wang, Z ; Shi, HL ; Chen, Z ; Chiang, FK ; Tian, HF ; Yang, HX ; Fang, AF ; Wang, NL ; Li, JQ
刊名	CHINESE PHYSICS B
	2014
卷号	23 期号:8
关键词	superconductivity charge-density-wave structural modulation transmission electron microscopy
ISSN号	1674-1056
通讯作者	Li, JQ (reprint author), Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China.
中文摘要	Transmission electron microscopy (TEM) study of SrPt2As2 reveals two incommensurate modulations appearing in the charge-density-wave (CDW) state below T-CDW approximate to 470 K. These two structural modulations can be well explained in terms of condensations of two-coupled phonon modes with wave vectors of q(1) = 0.62a* on the a-b plane and q(2) = 0.23a* on the a-c plane. The atomic displacements occur along the b-axis direction for q(1) and along the c-axis direction for q(2), respectively. Moreover, the correlation between q(1) and q(2) can be generally written as q(1) = (q(2) + a*)/2 in the CDW state, suggesting the presence of essential coupling between q(1) and q(2). A small fraction of Ir doping on the Pt site in Sr(Pt1-xIrx)(2)As-2 (x < 0.06) could moderately change these CDW modulations and also affect their superconductivities.
资助信息	National Basic Research Program of China [2011CBA00101, 2010CB923002, 2012CB821404, 2011CB921703]; National Natural Science Foundation of China [11190022, 11274368, 51272277]; Chinese Academy of Sciences
语种	英语
公开日期	2015-04-14
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/58987]
专题	物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文
推荐引用方式 GB/T 7714	Wang, L,Wang, Z,Shi, HL,et al. Two-coupled structural modulations in charge-density-wave state of SrPt2As2 superconductor[J]. CHINESE PHYSICS B,2014,23(8).
APA	Wang, L.,Wang, Z.,Shi, HL.,Chen, Z.,Chiang, FK.,...&Li, JQ.(2014).Two-coupled structural modulations in charge-density-wave state of SrPt2As2 superconductor.CHINESE PHYSICS B,23(8).
MLA	Wang, L,et al."Two-coupled structural modulations in charge-density-wave state of SrPt2As2 superconductor".CHINESE PHYSICS B 23.8(2014).