Raman scattering investigation of superconducting Ba2Ti2Fe2As4O

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	Raman scattering investigation of superconducting Ba2Ti2Fe2As4O
	Wu, SF ; Richard, P ; Zhang, WL ; Lian, CS ; Sun, YL ; Cao, GH ; Wang, JT ; Ding, H
刊名	PHYSICAL REVIEW B
	2014
卷号	89 期号:13
ISSN号	1098-0121
通讯作者	Wu, SF (reprint author), Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China.
中文摘要	We have performed polarized Raman scattering measurements on the newly discovered superconductor Ba2Ti2Fe2As4O (T-c = 21 K). We observe seven out of eight Raman active modes, with frequencies in good accordance with first-principles calculations. The phonon spectra suggest neither strong electron-phonon nor spin-phonon coupling and vary only slightly with temperature, except for one E g mode associated with large displacements of As atoms near the Ti2O planes. We also identify a small anomaly around 125 K in the linewidth of an A(1g) mode involving the same As atoms. Our results suggest that the transition at 125 K is most likely driven by electronic interactions taking place in the Ti2O planes.
资助信息	CAS [2010Y1JB6]; MOST [2010CB923000, 2011CBA001000, 2011CBA00102, 2012CB821403, 2013CB921703]; NSFC from China [11004232, 11034011/A0402, 11234014, 11274362, 11274356]
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/311004/59546]
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	Wu, SF,Richard, P,Zhang, WL,et al. Raman scattering investigation of superconducting Ba2Ti2Fe2As4O[J]. PHYSICAL REVIEW B,2014,89(13).
APA	Wu, SF.,Richard, P.,Zhang, WL.,Lian, CS.,Sun, YL.,...&Ding, H.(2014).Raman scattering investigation of superconducting Ba2Ti2Fe2As4O.PHYSICAL REVIEW B,89(13).
MLA	Wu, SF,et al."Raman scattering investigation of superconducting Ba2Ti2Fe2As4O".PHYSICAL REVIEW B 89.13(2014).