Dirac and Weyl Superconductors in Three Dimensions

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Dirac and Weyl Superconductors in Three Dimensions

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Title: Dirac and Weyl Superconductors in Three Dimensions
Author(s):
Yang, S. A.;
Pan, H.;
Zhang, Fan
Item Type: Article
Keywords: Superconductors
Dirac nodes
Weyl nodes
Chiral symmetry (Nuclear physics)
Abstract: 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.
Publisher: American Physical Society
ISSN: 1079-7114
Source: Physical Review Letters
Link to Related Resource: http://dx.doi.org/10.1103/PhysRevLett.113.046401
Persistent Link: http://hdl.handle.net/10735.1/4175
Bibliographic Citation: Yang, S. A., H. Pan, and F. Zhang. 2014. "Dirac and weyl superconductors in three dimensions." Physical Review Letters 113(4).
Terms of Use: ©2014 American Physical Society
Sponsors: "This work was supported by SUTD-SRG-EPD-2013062, NSFC Grant No. 11174022, DARPA Grant No. SPAWAR N66001-11-1-4110, and NSF Grant No. NSF-PHY11-25915 (KITP)."

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