Experimental Realization of a Three-Dimensional Dirac Semimetal

被引：1014

作者：

Borisenko, Sergey ^{[1
]}

Gibson, Quinn ^{[2
]}

Evtushinsky, Danil ^{[1
]}

Zabolotnyy, Volodymyr ^{[1
]}

Buechner, Bernd ^{[1
,3
]}

Cava, Robert J. ^{[2
]}

机构：

[1] IFW Dresden, Inst Solid State Res, D-01171 Dresden, Germany

[2] Princeton Univ, Dept Chem, Princeton, NJ 08544 USA

[3] Tech Univ Dresden, Inst Festkorperphys, D-01171 Dresden, Germany

来源：

PHYSICAL REVIEW LETTERS | 2014年 / 113卷 / 02期

关键词：

CD3AS2; CRYSTAL;

D O I：

10.1103/PhysRevLett.113.027603

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report the direct observation of the three-dimensional (3D) Dirac semimetal phase in cadmium arsenide (Cd3As2) by means of angle-resolved photoemission spectroscopy. We identify two momentum regions where electronic states that strongly disperse in all directions form narrow conelike structures, and thus prove the existence of the long sought 3D Dirac points. This electronic structure naturally explains why Cd3As2 has one of the highest known bulk electron mobilities. This realization of a 3D Dirac semimetal in Cd3As2 not only opens a direct path to a wide spectrum of applications, but also offers a robust platform for engineering topologically nontrivial phases including Weyl semimetals and quantum spin Hall systems.

引用

页数：5

共 22 条

[1] The Crystal and Electronic Structures of Cd3As2, the Three-Dimensional Electronic Analogue of Graphene [J].

Ali, Mazhar N. ;

Gibson, Quinn ;

Jeon, Sangjun ;

Zhou, Brian B. ;

Yazdani, Ali ;

Cava, R. J. .

INORGANIC CHEMISTRY, 2014, 53 (08) :4062-4067

[2]

Borisenko S. V., 2012, Synchrotron Radiation News, V25, P6, DOI 10.1080/08940886.2012.720159

[3] Pseudogap and charge density waves in two dimensions [J].

Borisenko, S. V. ;

Kordyuk, A. A. ;

Yaresko, A. N. ;

Zabolotnyy, V. B. ;

Inosov, D. S. ;

Schuster, R. ;

Buechner, B. ;

Weber, R. ;

Follath, R. ;

Patthey, L. ;

Berger, H. .

PHYSICAL REVIEW LETTERS, 2008, 100 (19)

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

Burkov, A. A. ;

Balents, Leon .

PHYSICAL REVIEW LETTERS, 2011, 107 (12)

[5] INVERTED BAND-STRUCTURE OF CD3AS2 [J].

DOWGIALLOPLENKIEWICZ, B ;

PLENKIEWICZ, P .

PHYSICA STATUS SOLIDI B-BASIC RESEARCH, 1979, 94 (01) :K57-K60

[6] Time-reversal invariant realization of the Weyl semimetal phase [J].

Halasz, Gabor B. ;

Balents, Leon .

PHYSICAL REVIEW B, 2012, 85 (03)

[7] Colloquium: Topological insulators [J].

Hasan, M. Z. ;

Kane, C. L. .

REVIEWS OF MODERN PHYSICS, 2010, 82 (04) :3045-3067

[8] Quantum spin Hall effect in graphene [J].

Kane, CL ;

Mele, EJ .

PHYSICAL REVIEW LETTERS, 2005, 95 (22)

[9] Photoemission-induced gating of topological insulators [J].

Kordyuk, A. A. ;

Kim, T. K. ;

Zabolotnyy, V. B. ;

Evtushinsky, D. V. ;

Bauch, M. ;

Hess, C. ;

Buechner, B. ;

Berger, H. ;

Borisenko, S. V. .

PHYSICAL REVIEW B, 2011, 83 (08)

[10] Discovery of a Three-Dimensional Topological Dirac Semimetal, Na3Bi [J].

Liu, Z. K. ;

Zhou, B. ;

Zhang, Y. ;

Wang, Z. J. ;

Weng, H. M. ;

Prabhakaran, D. ;

Mo, S-K ;

Shen, Z. X. ;

Fang, Z. ;

Dai, X. ;

Hussain, Z. ;

Chen, Y. L. .

SCIENCE, 2014, 343 (6173) :864-867

← 1 2 3 →