Dirac and Weyl Superconductors in Three Dimensions

被引：261
作者：
Yang, Shengyuan A. [1 ]
Pan, Hui [2 ]
Zhang, Fan [3 ,4 ,5 ]
机构：
[1] Singapore Univ Technol & Design, Singapore 138682, Singapore
[2] Beihang Univ, Dept Phys, Beijing 100191, Peoples R China
[3] Univ Texas Dallas, Dept Phys, Richardson, TX 75080 USA
[4] Univ Penn, Dept Phys & Astron, Philadelphia, PA 19104 USA
[5] Univ Calif Santa Barbara, Kavli Inst Theoret Phys, Santa Barbara, CA 93106 USA
来源：
PHYSICAL REVIEW LETTERS | 2014年 / 113卷 / 04期
关键词：
TOPOLOGICAL INSULATORS;
D O I：
10.1103/PhysRevLett.113.046401
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We introduce the concept of three-dimensional Dirac (Weyl) superconductors (SC), which have protected bulk fourfold (twofold) nodal points and surface Majorana arcs at zero energy. We provide a sufficient criterion for realizing them in centrosymmetric SCs with odd-parity pairing and mirror symmetry. Pairs of Dirac nodes appear in a mirror-invariant plane when the mirror winding number is nontrivial. Breaking mirror symmetry may gap Dirac nodes producing a topological SC. Each Dirac node evolves to a nodal ring when inversion-gauge symmetry is broken, whereas it splits into a pair of Weyl nodes when, and only when, time-reversal symmetry is broken.
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页数：5
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