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	Infrared study of giant dielectric constant in Li- and Ti-doped NiO
	Kim, J ; Lee, Y ; Souchkov, A ; Lee, JS ; Drew, HD ; Oh, SJ ; Nan, CW ; Choi, EJ
	2010-05-10 ; 2010-05-10
关键词	Physics, Condensed Matter
中文摘要	We have measured optical reflectivity of Li- and Ti-doped NiO (LTNO) in the infrared range at various temperatures. A Drude-type absorption is found at low energy, omega<100 cm(-1) and its spectral weight increases substantially as temperature decreases. This observation and dc-resistivity result show that LTNO has a conductive grain and resistive boundary. Such composite structure provides evidence of the Maxwell-Wagner (MW) mechanism as the origin of the high dielectric constant epsilon(o). We propose a three-phase granular structure and show that this extended MW model explains the observed frequency- and temperature dependence of the dielectric constant as well as the giant value of epsilon(o).
语种	英语 ; 英语
出版者	AMERICAN PHYSICAL SOC ; COLLEGE PK ; ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/21240]
专题	清华大学
推荐引用方式 GB/T 7714	Kim, J,Lee, Y,Souchkov, A,et al. Infrared study of giant dielectric constant in Li- and Ti-doped NiO[J],2010, 2010.
APA	Kim, J.,Lee, Y.,Souchkov, A.,Lee, JS.,Drew, HD.,...&Choi, EJ.(2010).Infrared study of giant dielectric constant in Li- and Ti-doped NiO..
MLA	Kim, J,et al."Infrared study of giant dielectric constant in Li- and Ti-doped NiO".(2010).

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