Far infrared optical properties of the pyrochlore spin ice compound Dy2Ti2O7

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	Far infrared optical properties of the pyrochlore spin ice compound Dy2Ti2O7
	Bi, CZ ; Ma, JY ; Zhao, BR ; Tang, Z ; Yin, D ; Li, CZ ; Yao, DZ ; Shi, J ; Qiu, XG
刊名	JOURNAL OF PHYSICS-CONDENSED MATTER
	2005
卷号	17 期号:34 页码:5225
关键词	SINGLE-CRYSTALS REFLECTIVITY SPECTRA
ISSN号	0953-8984
通讯作者	Bi, CZ: Chinese Acad Sci, Natl Lab Superconductiv, Inst Phys, POB 603, Beijing 100080, Peoples R China.
中文摘要	Near normal incidence far infrared reflectivity spectra of [1 1 1] dysprosium titanate (DY2Ti2O7) single crystal have been measured at different temperatures. Seven phonon modes (eight at low temperature) are identified at frequencies below 1000 cm(-1). Optical conductivity spectra are obtained by fitting all the reflectivity spectra with the factorized form of the dielectric function. Both the Born effective charges and the static optical permittivity are found to increase with decreasing temperature. Moreover, phonon linewidth narrowing and a phonon mode shift with decreasing temperature are also observed, which may result from enhanced charge localization. The redshift of several low frequency modes is attributed to the spin-phonon coupling. All observed optical properties can be explained within the framework of the nearest neighbour ferromagnetic (FM) spin ice model.
收录类别	SCI
语种	英语
公开日期	2013-09-17
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/37999]
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	Bi, CZ,Ma, JY,Zhao, BR,et al. Far infrared optical properties of the pyrochlore spin ice compound Dy2Ti2O7[J]. JOURNAL OF PHYSICS-CONDENSED MATTER,2005,17(34):5225.
APA	Bi, CZ.,Ma, JY.,Zhao, BR.,Tang, Z.,Yin, D.,...&Qiu, XG.(2005).Far infrared optical properties of the pyrochlore spin ice compound Dy2Ti2O7.JOURNAL OF PHYSICS-CONDENSED MATTER,17(34),5225.
MLA	Bi, CZ,et al."Far infrared optical properties of the pyrochlore spin ice compound Dy2Ti2O7".JOURNAL OF PHYSICS-CONDENSED MATTER 17.34(2005):5225.