CaTe: a new topological node-line and Dirac semimetal

被引：113

作者：

Du, Yongping ^{[1
,2
]}

Tang, Feng ^{[1
,2
]}

Wang, Di ^{[1
,2
]}

Sheng, Li ^{[1
,2
,3
]}

Kan, Er-Jun ^{[4
,5
]}

Duan, Chun-Gang ^{[6
]}

Savrasov, Sergey Y. ^{[7
]}

Wan, Xiangang ^{[1
,2
,3
]}

机构：

[1] Nanjing Univ, Natl Lab Solid State Microstruct, Nanjing 210093, Jiangsu, Peoples R China

[2] Nanjing Univ, Dept Phys, Nanjing 210093, Jiangsu, Peoples R China

[3] Nanjing Univ, Collaborat Innovat Ctr Adv Microstruct, Nanjing 210093, Jiangsu, Peoples R China

[4] Nanjing Univ Sci & Technol, Minist Educ, Key Lab Soft Chem & Funct Mat, Nanjing 210094, Jiangsu, Peoples R China

[5] Nanjing Univ Sci & Technol, Dept Appl Phys, Nanjing 210094, Jiangsu, Peoples R China

[6] East China Normal Univ, Minist Educ, Key Lab Polar Mat & Devices, Shanghai 200062, Peoples R China

[7] Univ Calif Davis, Dept Phys, One Shields Ave, Davis, CA 95616 USA

来源：

NPJ QUANTUM MATERIALS | 2017年 / 2卷

基金：

美国国家科学基金会;

关键词：

HIGH-PRESSURE; CALCIUM CHALCOGENIDES; FERMI ARCS; DISCOVERY; INSULATORS; CD3AS2; STATE;

D O I：

10.1038/s41535-016-0005-4

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Combining first-principles calculations and effective model analysis, we predict that CaTe is a topological node-line semimetal in the absence of the spin-orbit coupling. Using a slab model, we obtain the nearly flat drumhead surface state near the Fermi level. When the spin-orbit coupling is included, three node lines will evolve into a pair of Dirac points along the M-R line. These Dirac points are robust and protected by the C-4 rotation symmetry. Once this crystal symmetry is broken, the Dirac points will be eliminated, and the system becomes a strong topological insulator.

引用

页数：4

共 56 条

[1] Topological Insulator Materials [J].

Ando, Yoichi .

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 2013, 82 (10)

[2]

[Anonymous], 2015, PREPRINT

[3]

Balents L., 2011, PHYSICS, V4, P36, DOI DOI 10.1103/PHYSICS.4.36

[4] Quantum spin Hall effect and topological phase transition in HgTe quantum wells [J].

Bernevig, B. Andrei ;

Hughes, Taylor L. ;

Zhang, Shou-Cheng .

SCIENCE, 2006, 314 (5806) :1757-1761

[5] Quantum spin hall effect [J].

Bernevig, BA ;

Zhang, SC .

PHYSICAL REVIEW LETTERS, 2006, 96 (10)

[6]

Blaha P., 2001, Calculating Cryst. Prop., V60

[7] High pressure induced structural, elastic and electronic properties of Calcium Chalcogenides CaX (X = S, Se and Te) via first-principles calculations [J].

Boucenna, S. ;

Medkour, Y. ;

Louail, L. ;

Boucenna, M. ;

Hachemi, A. ;

Roumili, A. .

COMPUTATIONAL MATERIALS SCIENCE, 2013, 68 :325-334

[8] Topological nodal semimetals [J].

Burkov, A. A. ;

Hook, M. D. ;

Balents, Leon .

PHYSICAL REVIEW B, 2011, 84 (23)

[9] Weyl Semimetal in a Topological Insulator Multilayer [J].

Burkov, A. A. ;

Balents, Leon .

PHYSICAL REVIEW LETTERS, 2011, 107 (12)

[10] Nanostructured Carbon Allotropes with Weyl-like Loops and Points [J].

Chen, Yuanping ;

Xie, Yuee ;

Yang, Shengyuan A. ;

Pan, Hui ;

Zhang, Fan ;

Cohen, Marvin L. ;

Zhang, Shengbai .

NANO LETTERS, 2015, 15 (10) :6974-6978

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