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; Liu, ZT; Liu, WL; Huang, YB; Xu, ZA; Shen, DW; Zheng, Y
2018
发表期刊NATURE COMMUNICATIONS
ISSN2041-1723
卷号9页码:-
文章类型期刊论文
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.
关键词Black Phosphorus Thermoelectric Performance
DOI10.1038/s41467-017-02566-1
收录类别SCI
语种英语
WOS记录号WOS:000419308000008
引用统计
文献类型期刊论文
条目标识符http://ir.sinap.ac.cn/handle/331007/28960
专题中科院上海应用物理研究所2011-2018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
11.Liu, ZT
12.Liu, WL
13.Huang, YB
14.Xu, ZA
15.Shen, DW
16.Zheng, Y
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):-.
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