Drumhead surface states and topological nodal-line fermions in TlTaSe2

被引：287

作者：

Bian, Guang ^{[1
]}

Chang, Tay-Rong ^{[1
,2
]}

Zheng, Hao ^{[1
]}

Velury, Saavanth ^{[3
]}

Xu, Su-Yang ^{[1
]}

Neupert, Titus ^{[1
,4
]}

Chiu, Ching-Kai ^{[5
]}

Huang, Shin-Ming ^{[6
,7
,8
,9
]}

Sanchez, Daniel S. ^{[1
]}

Belopolski, Ilya ^{[1
]}

Alidoust, Nasser ^{[1
]}

Chen, Peng-Jen ^{[10
,11
,12
,13
]}

Chang, Guoqing ^{[6
,7
,8
]}

Bansil, Arun ^{[14
]}

Jeng, Horng-Tay ^{[2
,13
]}

Lin, Hsin ^{[6
,7
,8
]}

Hasan, M. Zahid ^{[1
]}

机构：

[1] Princeton Univ, Dept Phys, Lab Topol Quantum Matter & Spect B7, Princeton, NJ 08544 USA

[2] Natl Tsing Hua Univ, Dept Phys, Hsinchu 30013, Taiwan

[3] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA

[4] Princeton Univ, Princeton Ctr Theoret Sci, Princeton, NJ 08544 USA

[5] Univ Maryland, Dept Phys, Condensed Matter Theory Ctr, College Pk, MD 20742 USA

[6] Natl Univ Singapore, Ctr Adv Mat 2D, 6 Sci Dr 2, Singapore 117546, Singapore

[7] Natl Univ Singapore, Graphene Res Ctr, 6 Sci Dr 2, Singapore 117546, Singapore

[8] Natl Univ Singapore, Dept Phys, 2 Sci Dr 3, Singapore 117542, Singapore

[9] Natl Sun Yat Sen Univ, Dept Phys, Kaohsiung 80424, Taiwan

[10] Natl Taiwan Univ, Dept Phys, Taipei 10617, Taiwan

[11] Acad Sinica, Taiwan Int Grad Program, Nano Sci & Technol Program, Taipei 11529, Taiwan

[12] Natl Taiwan Univ, Taipei 11529, Taiwan

[13] Acad Sinica, Inst Phys, Taipei 11529, Taiwan

[14] Northeastern Univ, Dept Phys, Boston, MA 02115 USA

来源：

PHYSICAL REVIEW B | 2016年 / 93卷 / 12期

基金：

新加坡国家研究基金会;

关键词：

DIRAC SEMIMETAL; METAL; SUPERCONDUCTIVITY; INSULATORS; TRANSITION; DISCOVERY; ELECTRON; ARCS;

D O I：

10.1103/PhysRevB.93.121113

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A topological nodal-line semimetal is a state of matter with one-dimensional bulk nodal lines and two-dimensional so-called drumhead surface bands. Based on first-principles calculations and an effective k.p model, we theoretically propose the existence of topological nodal-line fermions in the ternary transition-metal chalcogenide TlTaSe2. The noncentrosymmetric structure and strong spin-orbit coupling give rise to spinful nodal-line bulk states which are protected by a mirror reflection symmetry of this compound. This is remarkably distinguished from other proposed nodal-line semimetals such as Cu3NPb(Zn) in which the nodal line exists only in the limit of vanishing spin-orbit coupling and thus is not as robust. In addition, we show that the drumhead surface states in TlTaSe2, which are associated with the topological nodal lines, exhibit an unconventional chiral spin texture and an exotic Lifshitz transition as a consequence of the linkage among multiple drumhead surface-state pockets.

引用

页数：6

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