Enhanced thermoelectric performance in three-dimensional superlattice of topological insulator thin films

CORC > 厦门大学 > 物理技术－已发表论文

	Enhanced thermoelectric performance in three-dimensional superlattice of topological insulator thin films
	Fan, Zheyong ; Zheng, Jiansen ; Wang, Hui-Qiong ; Zheng, Jin-Cheng ; Zheng JC(郑金成)
刊名	http://dx.doi.org/10.1186/1556-276X-7-570
	2012-10-16
关键词	BI2TE3 SURFACE BI2SE3 STATES LIMIT SI
英文摘要	Minjiang Scholar Distinguished Professorship Program through Xiamen University of China; Specialized Research Fund for the Doctoral Program of Higher Education [20090121120028, 20100121120026]; Program for New Century Excellent Talents in University (NCET) [NCET-09-0680]; National Science Foundation of China [U1232110]; We show that certain three-dimensional (3D) superlattice nanostructure based on Bi2Te3 topological insulator thin films has better thermoelectric performance than two-dimensional (2D) thin films. The 3D superlattice shows a predicted peak value of ZT of approximately 6 for gapped surface states at room temperature and retains a high figure of merit ZT of approximately 2.5 for gapless surface states. In contrast, 2D thin films with gapless surface states show no advantage over bulk Bi2Te3. The enhancement of the thermoelectric performance originates from a combination of the reduction of lattice thermal conductivity by phonon-interface scattering, the high mobility of the topologically protected surface states, the enhancement of Seebeck coefficient, and the reduction of electron thermal conductivity by energy filtering. Our study shows that the nanostructure design of topological insulators provides a possible new way of ZT enhancement.
语种	英语
内容类型	期刊论文
源URL	[http://dspace.xmu.edu.cn/handle/2288/69970]
专题	物理技术－已发表论文
推荐引用方式 GB/T 7714	Fan, Zheyong,Zheng, Jiansen,Wang, Hui-Qiong,et al. Enhanced thermoelectric performance in three-dimensional superlattice of topological insulator thin films[J]. http://dx.doi.org/10.1186/1556-276X-7-570,2012.
APA	Fan, Zheyong,Zheng, Jiansen,Wang, Hui-Qiong,Zheng, Jin-Cheng,&郑金成.(2012).Enhanced thermoelectric performance in three-dimensional superlattice of topological insulator thin films.http://dx.doi.org/10.1186/1556-276X-7-570.
MLA	Fan, Zheyong,et al."Enhanced thermoelectric performance in three-dimensional superlattice of topological insulator thin films".http://dx.doi.org/10.1186/1556-276X-7-570 (2012).