Defects controlled hole doping and multivalley transport in SnSe single crystals

doi:10.1038/s41467-017-02566-1

CORC > 上海应用物理研究所 > 中国科学院上海应用物理研究所 > 中科院上海应用物理研究所2011-2017年

	Defects controlled hole doping and multivalley transport in SnSe single crystals
	Wang, Z ; Fan, CC ; Shen, ZX ; Hua, CQ ; Hu, QF ; Sheng, F ; Lu, YH ; Fang, HY ; Qiu, ZZ ; Lu, J
刊名	NATURE COMMUNICATIONS
	2018
卷号	9 页码:-
关键词	Black Phosphorus Thermoelectric Performance
ISSN号	2041-1723
DOI	10.1038/s41467-017-02566-1
文献子类	期刊论文
英文摘要	SnSe is a promising thermoelectric material with record-breaking figure of merit. However, to date a comprehensive understanding of the electronic structure and most critically, the self-hole-doping mechanism in SnSe is still absent. Here we report the highly anisotropic electronic structure of SnSe investigated by angle-resolved photoemission spectroscopy, in which a unique pudding-mould-shaped valence band with quasi-linear energy dispersion is revealed. We prove that p-type doping in SnSe is extrinsically controlled by local phase segregation of SnSe2 microdomains via interfacial charge transferring. The multivalley nature of the pudding-mould band is manifested in quantum transport by crystallographic axis-dependent weak localisation and exotic non-saturating negative magnetoresistance. Strikingly, quantum oscillations also reveal 3D Fermi surface with unusual interlayer coupling strength in p-SnSe, in which individual monolayers are interwoven by peculiar point dislocation defects. Our results suggest that defect engineering may provide versatile routes in improving the thermoelectric performance of the SnSe family.
语种	英语
WOS记录号	WOS:000419308000008
内容类型	期刊论文
源URL	[http://ir.sinap.ac.cn/handle/331007/28960]
专题	上海应用物理研究所_中科院上海应用物理研究所2011-2017年
作者单位	1.Wang, Z 2.Fan, CC 3.Shen, ZX 4.Hua, CQ 5.Hu, QF 6.Sheng, F 7.Lu, YH 8.Fang, HY 9.Qiu, ZZ 10.Lu, J
推荐引用方式 GB/T 7714	Wang, Z,Fan, CC,Shen, ZX,et al. Defects controlled hole doping and multivalley transport in SnSe single crystals[J]. NATURE COMMUNICATIONS,2018,9:-.
APA	Wang, Z.,Fan, CC.,Shen, ZX.,Hua, CQ.,Hu, QF.,...&Zheng, Y.(2018).Defects controlled hole doping and multivalley transport in SnSe single crystals.NATURE COMMUNICATIONS,9,-.
MLA	Wang, Z,et al."Defects controlled hole doping and multivalley transport in SnSe single crystals".NATURE COMMUNICATIONS 9(2018):-.