Nodal-knot semimetals

被引：173

作者：

Bi, Ren ^{[1
]}

Yan, Zhongbo ^{[1
]}

Lu, Ling ^{[2
]}

Wang, Zhong ^{[1
,3
]}

机构：

[1] Tsinghua Univ, Inst Adv Study, Beijing 100084, Peoples R China

[2] Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China

[3] Collaborat Innovat Ctr Quantum Matter, Beijing 100871, Peoples R China

来源：

PHYSICAL REVIEW B | 2017年 / 96卷 / 20期

基金：

中国博士后科学基金;

关键词：

DISCOVERY; MAGNETORESISTANCE; NODES; SPIN;

D O I：

10.1103/PhysRevB.96.201305

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Topological nodal-line semimetals are characterized by one-dimensional lines of band crossing in the Brillouin zone. In contrast to nodal points, nodal lines can be in topologically nontrivial configurations. In this Rapid Communication, we introduce the concept of "nodal-knot semimetals,"whose nodal lines form topologically nontrivial knots in the Brillouin zone. We introduce a generic construction of nodal-knot semimetals, which yields the simplest trefoil nodal knot and other more complicated nodal knots. The knotted-unknotted transitions by nodal-line reconnections are also studied. Our work brings the knot theory to the subject of topological semimetals.

引用

页数：7

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