Non-Drude Magneto-Transport Behavior in a Topological Crystalline Insulator/Band Insulator Heterostructure

doi:10.1021/acs.nanolett.8b03113

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	Non-Drude Magneto-Transport Behavior in a Topological Crystalline Insulator/Band Insulator Heterostructure
	Liu, CW ; Wei, F 1,2; Premasiri, K ; Liu, SH ; Ma, S 1; Zhang, ZD ; Gao, XPA
刊名	NANO LETTERS
	2018-10-01
卷号	18 期号:10 页码:6538-6543
关键词	Magneto-transport Drude model topological insulator linear magneto-resistance
ISSN号	1530-6984
DOI	10.1021/acs.nanolett.8b03113
英文摘要	The Drude model is one of the most fundamental models used to understand the electronic carrier transport in materials, including recently discovered topological materials. Here, we present a magneto-transport study revealing the non-Drude transport behavior in a heterostructure of topological crystalline insulator (TCI) SnTe and band insulator PbTe which exhibits a nonsaturating linear magneto-resistance (MR) effect, a novel phenomenon widely observed in topological materials with gapless dispersion. It is shown that in the van der Pauw geometry in which the longitudinal and transverse magneto-resistances are measured to extract the magneto-conductivity, the two-band Drude model is not sufficient to self-consistently describe both the longitudinal and transverse magneto-conductivities. Furthermore, in the Corbino geometry, which directly measures the longitudinal magneto-conductivity sigma(xx)(B) for a straightforward comparison with the Drude model, the MR, 1/sigma(xx)(B), still reveals a large linear MR effect, in direct discrepancy with the Drude model. While shining further light on the multiple-carrier transport in TCI, this study highlights an unusual magneto-transport character of topological materials that challenges the standard Drude picture of electron transport.
学科主题	Chemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter
语种	英语
WOS记录号	WOS:000447355400060
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/79923]
专题	金属研究所_中国科学院金属研究所
作者单位	1.[Liu, Chieh-Wen; Premasiri, Kasun; Liu, Shuhao; Gao, Xuan P. A.] Case Western Reserve Univ, Dept Phys, 2076 Adelbert Rd, Cleveland, OH 44106 USA 2.Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, 72 Wenhua Rd, Shenyang 110016, Liaoning, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Liu, CW,Wei, F,Premasiri, K,et al. Non-Drude Magneto-Transport Behavior in a Topological Crystalline Insulator/Band Insulator Heterostructure[J]. NANO LETTERS,2018,18(10):6538-6543.
APA	Liu, CW.,Wei, F.,Premasiri, K.,Liu, SH.,Ma, S.,...&Gao, XPA.(2018).Non-Drude Magneto-Transport Behavior in a Topological Crystalline Insulator/Band Insulator Heterostructure.NANO LETTERS,18(10),6538-6543.
MLA	Liu, CW,et al."Non-Drude Magneto-Transport Behavior in a Topological Crystalline Insulator/Band Insulator Heterostructure".NANO LETTERS 18.10(2018):6538-6543.