Kennedy, Ricardo (2016). Topological Hopf-Chern insulators and the Hopf superconductor. Phys. Rev. B, 94 (3). COLLEGE PK: AMER PHYSICAL SOC. ISSN 2469-9969
Full text not available from this repository.Abstract
We introduce new three-dimensional (3D) topological phases of two-band models using the Pontryagin-Thom construction. In symmetry class A these are the infinitely many Hopf-Chern topological insulators, which are hybrids of layered Chern insulators and Hopf insulators. Being constructed by a modification of the experimentally observed Chern insulators, these provide promising candidates for the observation of a genuinely 3D topological phase in class A. In symmetry class C, there is a Z(2) classification with the nontrivial topological phase, the Hopf superconductor, being realized by a construction that doubles a Hopf insulator in momentum space. For these new topological phases we introduce concrete tight-binding Hamiltonians and investigate their energy spectra in the presence of a boundary, revealing gapless surface modes in accordance with the bulk-boundary correspondence.
Item Type: | Journal Article | ||||||||
Creators: |
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URN: | urn:nbn:de:hbz:38-269803 | ||||||||
DOI: | 10.1103/PhysRevB.94.035137 | ||||||||
Journal or Publication Title: | Phys. Rev. B | ||||||||
Volume: | 94 | ||||||||
Number: | 3 | ||||||||
Date: | 2016 | ||||||||
Publisher: | AMER PHYSICAL SOC | ||||||||
Place of Publication: | COLLEGE PK | ||||||||
ISSN: | 2469-9969 | ||||||||
Language: | English | ||||||||
Faculty: | Unspecified | ||||||||
Divisions: | Unspecified | ||||||||
Subjects: | no entry | ||||||||
Uncontrolled Keywords: |
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Refereed: | Yes | ||||||||
URI: | http://kups.ub.uni-koeln.de/id/eprint/26980 |
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