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Three-dimensional Majorana fermions in chiral superconductors
Using a systematic symmetry and topology analysis, we establish that three-dimensional chiral superconductors with strong spin-orbit coupling and odd-parity pairing generically host low-energy nodal quasiparticles that are spin-nondegenerate and realize Majorana fermions in three dimensions. By exam...
Autores principales: | , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
American Association for the Advancement of Science
2016
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5142806/ https://www.ncbi.nlm.nih.gov/pubmed/27957543 http://dx.doi.org/10.1126/sciadv.1601835 |
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author | Kozii, Vladyslav Venderbos, Jörn W. F. Fu, Liang |
author_facet | Kozii, Vladyslav Venderbos, Jörn W. F. Fu, Liang |
author_sort | Kozii, Vladyslav |
collection | PubMed |
description | Using a systematic symmetry and topology analysis, we establish that three-dimensional chiral superconductors with strong spin-orbit coupling and odd-parity pairing generically host low-energy nodal quasiparticles that are spin-nondegenerate and realize Majorana fermions in three dimensions. By examining all types of chiral Cooper pairs with total angular momentum J formed by Bloch electrons with angular momentum j in crystals, we obtain a comprehensive classification of gapless Majorana quasiparticles in terms of energy-momentum relation and location on the Fermi surface. We show that the existence of bulk Majorana fermions in the vicinity of spin-selective point nodes is rooted in the nonunitary nature of chiral pairing in spin-orbit–coupled superconductors. We address experimental signatures of Majorana fermions and find that the nuclear magnetic resonance spin relaxation rate is significantly suppressed for nuclear spins polarized along the nodal direction as a consequence of the spin-selective Majorana nature of nodal quasiparticles. Furthermore, Majorana nodes in the bulk have nontrivial topology and imply the presence of Majorana bound states on the surface, which form arcs in momentum space. We conclude by proposing the heavy fermion superconductor PrOs(4)Sb(12) and related materials as promising candidates for nonunitary chiral superconductors hosting three-dimensional Majorana fermions. |
format | Online Article Text |
id | pubmed-5142806 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2016 |
publisher | American Association for the Advancement of Science |
record_format | MEDLINE/PubMed |
spelling | pubmed-51428062016-12-12 Three-dimensional Majorana fermions in chiral superconductors Kozii, Vladyslav Venderbos, Jörn W. F. Fu, Liang Sci Adv Research Articles Using a systematic symmetry and topology analysis, we establish that three-dimensional chiral superconductors with strong spin-orbit coupling and odd-parity pairing generically host low-energy nodal quasiparticles that are spin-nondegenerate and realize Majorana fermions in three dimensions. By examining all types of chiral Cooper pairs with total angular momentum J formed by Bloch electrons with angular momentum j in crystals, we obtain a comprehensive classification of gapless Majorana quasiparticles in terms of energy-momentum relation and location on the Fermi surface. We show that the existence of bulk Majorana fermions in the vicinity of spin-selective point nodes is rooted in the nonunitary nature of chiral pairing in spin-orbit–coupled superconductors. We address experimental signatures of Majorana fermions and find that the nuclear magnetic resonance spin relaxation rate is significantly suppressed for nuclear spins polarized along the nodal direction as a consequence of the spin-selective Majorana nature of nodal quasiparticles. Furthermore, Majorana nodes in the bulk have nontrivial topology and imply the presence of Majorana bound states on the surface, which form arcs in momentum space. We conclude by proposing the heavy fermion superconductor PrOs(4)Sb(12) and related materials as promising candidates for nonunitary chiral superconductors hosting three-dimensional Majorana fermions. American Association for the Advancement of Science 2016-12-07 /pmc/articles/PMC5142806/ /pubmed/27957543 http://dx.doi.org/10.1126/sciadv.1601835 Text en Copyright © 2016, The Authors http://creativecommons.org/licenses/by-nc/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial license (http://creativecommons.org/licenses/by-nc/4.0/) , which permits use, distribution, and reproduction in any medium, so long as the resultant use is not for commercial advantage and provided the original work is properly cited. |
spellingShingle | Research Articles Kozii, Vladyslav Venderbos, Jörn W. F. Fu, Liang Three-dimensional Majorana fermions in chiral superconductors |
title | Three-dimensional Majorana fermions in chiral superconductors |
title_full | Three-dimensional Majorana fermions in chiral superconductors |
title_fullStr | Three-dimensional Majorana fermions in chiral superconductors |
title_full_unstemmed | Three-dimensional Majorana fermions in chiral superconductors |
title_short | Three-dimensional Majorana fermions in chiral superconductors |
title_sort | three-dimensional majorana fermions in chiral superconductors |
topic | Research Articles |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5142806/ https://www.ncbi.nlm.nih.gov/pubmed/27957543 http://dx.doi.org/10.1126/sciadv.1601835 |
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