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Thermoelectric transport in temperature-driven two-dimensional topological insulators
Dong, H. M.1; Li, L. L.2; Xu, W.2,3; Liu, J. L.4
2017-08-08
Source PublicationSCIENTIFIC REPORTS
Volume7
AbstractWe theoretically investigate on the thermoelectric (TE) transport properties of edge and bulk states in a temperature-driven two-dimensional (2D) topological insulator (TI) realized from CdTe/HgTe/CdTe quantum wells (QWs). It is found that the temperature can effectively drive a TI phase in CdTe/HgTe/CdTe QWs. We find that the TE transport properties of 2D TI can be governed by edge states, bulk states, or their interplay, depending on driving temperature and chemical potential of the system. Moreover, we find that the TE figure of merit ZT shows a peak at relatively low temperatures due to the competition between bulk and edge transports. This peak vanishes at relatively high temperatures due to the dominance of bulk states in the TE transport. With decreasing the ribbon width of the temperature-driven 2D TI, the low-temperature ZT exhibits two peaks, among which one occurs due to the bulk-edge competition and the other occurs due to the edge-edge hybridization; while the high-temperature ZT first exhibits the bulk-state behavior and then the edge-state one, which is indicative of a bulk-to-edge transition in the TE transport.
SubtypeArticle
WOS HeadingsScience & Technology
Funding OrganizationNational Natural Science Foundation of China(11304316 ; National Natural Science Foundation of China(11304316 ; Fundamental Research Funds for the Central Universities(2015XKMS077) ; Fundamental Research Funds for the Central Universities(2015XKMS077) ; 11604380) ; 11604380) ; National Natural Science Foundation of China(11304316 ; National Natural Science Foundation of China(11304316 ; Fundamental Research Funds for the Central Universities(2015XKMS077) ; Fundamental Research Funds for the Central Universities(2015XKMS077) ; 11604380) ; 11604380)
DOI10.1038/s41598-017-08084-w
WOS KeywordHGTE QUANTUM-WELLS ; ENERGY-GAP ; ALLOY COMPOSITION ; HG1-XCDXTE ; DEPENDENCE ; STATE ; PHASE
Indexed BySCI
Language英语
Funding OrganizationNational Natural Science Foundation of China(11304316 ; National Natural Science Foundation of China(11304316 ; Fundamental Research Funds for the Central Universities(2015XKMS077) ; Fundamental Research Funds for the Central Universities(2015XKMS077) ; 11604380) ; 11604380) ; National Natural Science Foundation of China(11304316 ; National Natural Science Foundation of China(11304316 ; Fundamental Research Funds for the Central Universities(2015XKMS077) ; Fundamental Research Funds for the Central Universities(2015XKMS077) ; 11604380) ; 11604380)
WOS Research AreaScience & Technology - Other Topics
WOS SubjectMultidisciplinary Sciences
WOS IDWOS:000407180400018
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Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.hfcas.ac.cn:8080/handle/334002/33591
Collection中科院固体物理研究所
Affiliation1.China Univ Min & Technol, Sch Phys, Xuzhou 221116, Peoples R China
2.Chinese Acad Sci, Inst Solid State Phys, Key Lab Mat Phys, Hefei 230031, Anhui, Peoples R China
3.Yunnan Univ, Dept Phys, Kunming 650091, Yunnan, Peoples R China
4.China Univ Min & Technol, Sch Mat Sci & Engn, Xuzhou 221116, Peoples R China
Recommended Citation
GB/T 7714
Dong, H. M.,Li, L. L.,Xu, W.,et al. Thermoelectric transport in temperature-driven two-dimensional topological insulators[J]. SCIENTIFIC REPORTS,2017,7.
APA Dong, H. M.,Li, L. L.,Xu, W.,&Liu, J. L..(2017).Thermoelectric transport in temperature-driven two-dimensional topological insulators.SCIENTIFIC REPORTS,7.
MLA Dong, H. M.,et al."Thermoelectric transport in temperature-driven two-dimensional topological insulators".SCIENTIFIC REPORTS 7(2017).
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