Manipulation of type-I and type-II Dirac points in PdTe2 superconductor by external pressure

doi:10.1103/PhysRevB.96.075101

HFCAS OpenIR > 中科院固体物理研究所

	Manipulation of type-I and type-II Dirac points in PdTe2 superconductor by external pressure
	Xiao, R. C.1,2; Gong, P. L.3; Wu, Q. S.4,5; Lu, W. J.1 ; Wei, M. J.1,2; Li, J. Y.1,2; Lv, H. Y.1; Luo, X.1 ; Tong, P.1 ; Zhu, X. B.1; Sun, Y. P.1,6,7
	2017-08-01
发表期刊	PHYSICAL REVIEW B
摘要	A pair of type-II Dirac cones in PdTe2 was recently predicted by theories and confirmed in experiments, making PdTe2 the first material that processes both superconductivity and type-II Dirac fermions. In this paper, we study the evolution of Dirac cones in PdTe2 under hydrostatic pressure by first-principles calculations. Our results show that the pair of type-II Dirac points disappears at 6.1 GPa. Interestingly, a new pair of type-I Dirac points from the same two bands emerges at 4.7 GPa. Due to the distinctive band structures compared with those of PtSe2 and PtTe2, the two types of Dirac points can coexist in PdTe2 under proper pressure (4.7-6.1 GPa). The emergence of type-I Dirac cones and the disappearance of type-II Dirac ones are attributed to an increase/decrease of the energy of the states at the Gamma and A points, which have antibonding/bonding characters of the interlayer Te-Te atoms. On the other hand, we find that the superconductivity of PdTe2 slightly decreases with pressure. The pressure-induced types of Dirac cones combined with superconductivity may open a promising way to investigate the complex interactions between Dirac fermions and superconducting quasiparticles.
文章类型	Article
WOS标题词	Science & Technology ; Physical Sciences
DOI	10.1103/PhysRevB.96.075101
关键词[WOS]	TRANSITION ; SEMIMETAL ; DISCOVERY ; PHASE ; BORON
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 ; 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) ; Microsoft Research ; Microsoft Research ; Microsoft Research ; Microsoft Research ; Microsoft Research ; Microsoft Research ; Microsoft Research ; Microsoft Research ; Swiss National Science Foundation through the National Competence Center in Research MARVEL ; Swiss National Science Foundation through the National Competence Center in Research MARVEL ; Swiss National Science Foundation through the National Competence Center in Research MARVEL ; Swiss National Science Foundation through the National Competence Center in Research MARVEL ; Swiss National Science Foundation through the National Competence Center in Research MARVEL ; Swiss National Science Foundation through the National Competence Center in Research MARVEL ; Swiss National Science Foundation through the National Competence Center in Research MARVEL ; Swiss National Science Foundation through the National Competence Center in Research MARVEL ; Swiss National Science Foundation through the National Competence Center in Research QSIT ; Swiss National Science Foundation through the National Competence Center in Research QSIT ; Swiss National Science Foundation through the National Competence Center in Research QSIT ; Swiss National Science Foundation through the National Competence Center in Research QSIT ; Swiss National Science Foundation through the National Competence Center in Research QSIT ; Swiss National Science Foundation through the National Competence Center in Research QSIT ; Swiss National Science Foundation through the National Competence Center in Research QSIT ; Swiss National Science Foundation through the National Competence Center in Research QSIT ; 11404340 ; 11404340 ; 11404340 ; 11404340 ; 11404340 ; 11404340 ; 11404340 ; 11404340 ; 11404024 ; 11404024 ; 11404024 ; 11404024 ; 11404024 ; 11404024 ; 11404024 ; 11404024 ; U1232139) ; U1232139) ; U1232139) ; U1232139) ; U1232139) ; U1232139) ; U1232139) ; U1232139)
WOS研究方向	Physics
WOS类目	Physics, Condensed Matter
WOS记录号	WOS:000406671800001
引用统计	被引频次：63[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/334002/33567
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, Anhui, Peoples R China 2.Univ Sci & Technol China, Hefei 230026, Anhui, Peoples R China 3.Southern Univ Sci & Technol, Dept Phys, Shenzhen 518055, Peoples R China 4.ETH, Theoret Phys, CH-8093 Zurich, Switzerland 5.ETH, Stn Zurich Q, CH-8093 Zurich, Switzerland 6.Chinese Acad Sci, High Magnet Field Lab, Hefei 230031, Anhui, Peoples R China 7.Nanjing Univ, Collaborat Innovat Ctr Microstruct, Nanjing 210093, Jiangsu, Peoples R China
推荐引用方式 GB/T 7714	Xiao, R. C.,Gong, P. L.,Wu, Q. S.,et al. Manipulation of type-I and type-II Dirac points in PdTe2 superconductor by external pressure[J]. PHYSICAL REVIEW B,2017,96(7).
APA	Xiao, R. C..,Gong, P. L..,Wu, Q. S..,Lu, W. J..,Wei, M. J..,...&Sun, Y. P..(2017).Manipulation of type-I and type-II Dirac points in PdTe2 superconductor by external pressure.PHYSICAL REVIEW B,96(7).
MLA	Xiao, R. C.,et al."Manipulation of type-I and type-II Dirac points in PdTe2 superconductor by external pressure".PHYSICAL REVIEW B 96.7(2017).