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Article: Unified Theory of PT and CP Invariant Topological Metals and Nodal Superconductors

TitleUnified Theory of PT and CP Invariant Topological Metals and Nodal Superconductors
Authors
Issue Date2016
PublisherAmerican Physical Society. The Journal's web site is located at http://prl.aps.org
Citation
Physical Review Letters, 2016, v. 116 n. 15, p. 156402:1-6 How to Cite?
Abstract© 2016 American Physical Society.As PT and CP symmetries are fundamental in physics, we establish a unified topological theory of PT and CP invariant metals and nodal superconductors, based on the mathematically rigorous KO theory. Representative models are constructed for all nontrivial topological cases in dimensions d=1, 2, and 3, with their exotic physical meanings being elucidated in detail. Intriguingly, it is found that the topological charges of Fermi surfaces in the bulk determine an exotic direction-dependent distribution of topological subgap modes on the boundaries. Furthermore, by constructing an exact bulk-boundary correspondence, we show that the topological Fermi points of the PT and CP invariant classes can appear as gapless modes on the boundary of topological insulators with a certain type of anisotropic crystalline symmetry.
Persistent Identifierhttp://hdl.handle.net/10722/225655
ISSN
2015 Impact Factor: 7.645
2015 SCImago Journal Rankings: 3.731

 

DC FieldValueLanguage
dc.contributor.authorZhao, YX-
dc.contributor.authorSchnyder, AP-
dc.contributor.authorWang, Z-
dc.date.accessioned2016-05-20T08:09:47Z-
dc.date.available2016-05-20T08:09:47Z-
dc.date.issued2016-
dc.identifier.citationPhysical Review Letters, 2016, v. 116 n. 15, p. 156402:1-6-
dc.identifier.issn0031-9007-
dc.identifier.urihttp://hdl.handle.net/10722/225655-
dc.description.abstract© 2016 American Physical Society.As PT and CP symmetries are fundamental in physics, we establish a unified topological theory of PT and CP invariant metals and nodal superconductors, based on the mathematically rigorous KO theory. Representative models are constructed for all nontrivial topological cases in dimensions d=1, 2, and 3, with their exotic physical meanings being elucidated in detail. Intriguingly, it is found that the topological charges of Fermi surfaces in the bulk determine an exotic direction-dependent distribution of topological subgap modes on the boundaries. Furthermore, by constructing an exact bulk-boundary correspondence, we show that the topological Fermi points of the PT and CP invariant classes can appear as gapless modes on the boundary of topological insulators with a certain type of anisotropic crystalline symmetry.-
dc.languageeng-
dc.publisherAmerican Physical Society. The Journal's web site is located at http://prl.aps.org-
dc.relation.ispartofPhysical Review Letters-
dc.rightsPhysical Review Letters. Copyright © American Physical Society.-
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.titleUnified Theory of PT and CP Invariant Topological Metals and Nodal Superconductors-
dc.typeArticle-
dc.identifier.emailZhao, YX: yuxinphy@hku.hk-
dc.identifier.emailWang, Z: zwang@hku.hk-
dc.identifier.authorityWang, Z=rp00802-
dc.description.naturepostprint-
dc.identifier.doi10.1103/PhysRevLett.116.156402-
dc.identifier.scopuseid_2-s2.0-84963819709-
dc.identifier.hkuros257931-
dc.identifier.volume116-
dc.identifier.issue15-
dc.identifier.spage156402:1-
dc.identifier.epage156402:6-
dc.publisher.placeUnited States-

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