Manipulating superconductivity of 1T-TiTe2 by high pressure

doi:10.1039/c7tc00209b

HFCAS OpenIR > 中科院固体物理研究所

	Manipulating superconductivity of 1T-TiTe2 by high pressure
	Xiao, R. C.1; Lu, W. J.1 ; Shao, D. F.1; Li, J. Y.1,2; Wei, M. J.1,2; Lv, H. Y.1; Tong, P.1 ; Zhu, X. B.1; Sun, Y. P.1,3,4
	2017-05-07
发表期刊	JOURNAL OF MATERIALS CHEMISTRY C
摘要	Superconductivity of transition metal dichalcogenide 1T-TiTe2 under high pressure was investigated by first-principles calculations. Our results show that the superconductivity of 1T-TiTe2 exhibits very different behavior under hydrostatic and uniaxial pressure. The hydrostatic pressure is harmful to the superconductivity, while the uniaxial pressure is beneficial to the superconductivity. The superconducting transition temperature T-C at ambient pressure is 0.73 K, and it reduces monotonously under the hydrostatic pressure to 0.32 K at 30 GPa, while TC increases dramatically under the uniaxial pressure along the c axis. The established T-C of 6.34 K under the uniaxial pressure of 17 GPa, below which the structural stability is maintained, is above the liquid helium temperature of 4.2 K. The increase of the density of states at the Fermi level, the red-shift of the phonon density of states/Eliashberg spectral function F(omega)/alpha F-2(omega), and the softening of the acoustic modes with pressure are considered as the main reasons that lead to the enhanced superconductivity under uniaxial pressure. In view of the previously predicted topological phase transitions of 1T-TiTe2 under the uniaxial pressure (Q. Zhang et al., Phys. Rev. B: Condens. Matter Mater. Phys., 2013, 88, 155317), we consider 1T-TiTe2 as a possible candidate in transition metal chalcogenides for exploring topological superconductivity.
文章类型	Article
WOS标题词	Science & Technology ; Technology ; Physical Sciences
DOI	10.1039/c7tc00209b
关键词[WOS]	TRANSITION-METAL DICHALCOGENIDES ; TOPOLOGICAL INSULATORS ; TUNGSTEN DITELLURIDE ; BAND-STRUCTURE ; PHOTOEMISSION ; TITE2 ; MOTE2 ; STATE ; BORON ; MGB2
收录类别	SCI
语种	英语
项目资助者	National Key Research and Development Program of China(2016YFA0300404) ; National Key Research and Development Program of China(2016YFA0300404) ; National Key Research and Development Program of China(2016YFA0300404) ; National Key Research and Development Program of China(2016YFA0300404) ; National Key Research and Development Program of China(2016YFA0300404) ; National Key Research and Development Program of China(2016YFA0300404) ; National Key Research and Development Program of China(2016YFA0300404) ; National Key Research and Development Program of China(2016YFA0300404) ; National Nature Science Foundation of China(11674326 ; National Nature Science Foundation of China(11674326 ; National Nature Science Foundation of China(11674326 ; National Nature Science Foundation of China(11674326 ; National Nature Science Foundation of China(11674326 ; National Nature Science Foundation of China(11674326 ; National Nature Science Foundation of China(11674326 ; National Nature Science Foundation of China(11674326 ; Youth Innovation Promotion Association of CAS(2012310) ; Youth Innovation Promotion Association of CAS(2012310) ; Youth Innovation Promotion Association of CAS(2012310) ; Youth Innovation Promotion Association of CAS(2012310) ; Youth Innovation Promotion Association of CAS(2012310) ; Youth Innovation Promotion Association of CAS(2012310) ; Youth Innovation Promotion Association of CAS(2012310) ; Youth Innovation Promotion Association of CAS(2012310) ; Key Research Program of Frontier Sciences of CAS(QYZDB-SSW-SLH015) ; Key Research Program of Frontier Sciences of CAS(QYZDB-SSW-SLH015) ; Key Research Program of Frontier Sciences of CAS(QYZDB-SSW-SLH015) ; Key Research Program of Frontier Sciences of CAS(QYZDB-SSW-SLH015) ; Key Research Program of Frontier Sciences of CAS(QYZDB-SSW-SLH015) ; Key Research Program of Frontier Sciences of CAS(QYZDB-SSW-SLH015) ; Key Research Program of Frontier Sciences of CAS(QYZDB-SSW-SLH015) ; Key Research Program of Frontier Sciences of CAS(QYZDB-SSW-SLH015) ; Hefei Science Center of CAS(2016HSC-IU011) ; Hefei Science Center of CAS(2016HSC-IU011) ; Hefei Science Center of CAS(2016HSC-IU011) ; Hefei Science Center of CAS(2016HSC-IU011) ; Hefei Science Center of CAS(2016HSC-IU011) ; Hefei Science Center of CAS(2016HSC-IU011) ; Hefei Science Center of CAS(2016HSC-IU011) ; Hefei Science Center of CAS(2016HSC-IU011) ; 11404340 ; 11404340 ; 11404340 ; 11404340 ; 11404340 ; 11404340 ; 11404340 ; 11404340 ; 11274311 ; 11274311 ; 11274311 ; 11274311 ; 11274311 ; 11274311 ; 11274311 ; 11274311 ; 11404342 ; 11404342 ; 11404342 ; 11404342 ; 11404342 ; 11404342 ; 11404342 ; 11404342 ; U1232139) ; U1232139) ; U1232139) ; U1232139) ; U1232139) ; U1232139) ; U1232139) ; U1232139)
WOS研究方向	Materials Science ; Physics
WOS类目	Materials Science, Multidisciplinary ; Physics, Applied
WOS记录号	WOS:000401102800009
引用统计	被引频次：19[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.hfcas.ac.cn:8080/handle/334002/33426
专题	中科院固体物理研究所
作者单位	1.Chinese Acad Sci, Inst Solid State Phys, Key Lab Mat Phys, Hefei 230031, Peoples R China 2.Univ Sci & Technol China, Hefei 230026, Peoples R China 3.Chinese Acad Sci, High Magnet Field Lab, Hefei 230031, Peoples R China 4.Nanjing Univ, Collaborat Innovat Ctr Microstruct, Nanjing 210093, Jiangsu, Peoples R China
推荐引用方式 GB/T 7714	Xiao, R. C.,Lu, W. J.,Shao, D. F.,et al. Manipulating superconductivity of 1T-TiTe2 by high pressure[J]. JOURNAL OF MATERIALS CHEMISTRY C,2017,5(17):4167-4173.
APA	Xiao, R. C..,Lu, W. J..,Shao, D. F..,Li, J. Y..,Wei, M. J..,...&Sun, Y. P..(2017).Manipulating superconductivity of 1T-TiTe2 by high pressure.JOURNAL OF MATERIALS CHEMISTRY C,5(17),4167-4173.
MLA	Xiao, R. C.,et al."Manipulating superconductivity of 1T-TiTe2 by high pressure".JOURNAL OF MATERIALS CHEMISTRY C 5.17(2017):4167-4173.