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Antiferromagnetism and superconductivity in the half-Heusler semimetal HoPdBi
We observed the coexistence of superconductivity and antiferromagnetic order in the single-crystalline ternary pnictide HoPdBi, a plausible topological semimetal. The compound orders antiferromagnetically at T(N) = 1.9 K and exhibits superconductivity below T(c) = 0.7 K, which was confirmed by magne...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group
2016
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4700465/ https://www.ncbi.nlm.nih.gov/pubmed/26728755 http://dx.doi.org/10.1038/srep18797 |
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author | Pavlosiuk, Orest Kaczorowski, Dariusz Fabreges, Xavier Gukasov, Arsen Wiśniewski, Piotr |
author_facet | Pavlosiuk, Orest Kaczorowski, Dariusz Fabreges, Xavier Gukasov, Arsen Wiśniewski, Piotr |
author_sort | Pavlosiuk, Orest |
collection | PubMed |
description | We observed the coexistence of superconductivity and antiferromagnetic order in the single-crystalline ternary pnictide HoPdBi, a plausible topological semimetal. The compound orders antiferromagnetically at T(N) = 1.9 K and exhibits superconductivity below T(c) = 0.7 K, which was confirmed by magnetic, electrical transport and specific heat measurements. The specific heat shows anomalies corresponding to antiferromagnetic ordering transition and crystalline field effect, but not to superconducting transition. Single-crystal neutron diffraction indicates that the antiferromagnetic structure is characterized by the [Image: see text] propagation vector. Temperature variation of the electrical resistivity reveals two parallel conducting channels of semiconducting and metallic character. In weak magnetic fields, the magnetoresistance exhibits weak antilocalization effect, while in strong fields and temperatures below 50 K it is large and negative. At temperatures below 7 K Shubnikov-de Haas oscillations with two frequencies appear in the resistivity. These oscillations have non-trivial Berry phase, which is a distinguished feature of Dirac fermions. |
format | Online Article Text |
id | pubmed-4700465 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2016 |
publisher | Nature Publishing Group |
record_format | MEDLINE/PubMed |
spelling | pubmed-47004652016-01-13 Antiferromagnetism and superconductivity in the half-Heusler semimetal HoPdBi Pavlosiuk, Orest Kaczorowski, Dariusz Fabreges, Xavier Gukasov, Arsen Wiśniewski, Piotr Sci Rep Article We observed the coexistence of superconductivity and antiferromagnetic order in the single-crystalline ternary pnictide HoPdBi, a plausible topological semimetal. The compound orders antiferromagnetically at T(N) = 1.9 K and exhibits superconductivity below T(c) = 0.7 K, which was confirmed by magnetic, electrical transport and specific heat measurements. The specific heat shows anomalies corresponding to antiferromagnetic ordering transition and crystalline field effect, but not to superconducting transition. Single-crystal neutron diffraction indicates that the antiferromagnetic structure is characterized by the [Image: see text] propagation vector. Temperature variation of the electrical resistivity reveals two parallel conducting channels of semiconducting and metallic character. In weak magnetic fields, the magnetoresistance exhibits weak antilocalization effect, while in strong fields and temperatures below 50 K it is large and negative. At temperatures below 7 K Shubnikov-de Haas oscillations with two frequencies appear in the resistivity. These oscillations have non-trivial Berry phase, which is a distinguished feature of Dirac fermions. Nature Publishing Group 2016-01-05 /pmc/articles/PMC4700465/ /pubmed/26728755 http://dx.doi.org/10.1038/srep18797 Text en Copyright © 2016, Macmillan Publishers Limited http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ |
spellingShingle | Article Pavlosiuk, Orest Kaczorowski, Dariusz Fabreges, Xavier Gukasov, Arsen Wiśniewski, Piotr Antiferromagnetism and superconductivity in the half-Heusler semimetal HoPdBi |
title | Antiferromagnetism and superconductivity in the half-Heusler semimetal HoPdBi |
title_full | Antiferromagnetism and superconductivity in the half-Heusler semimetal HoPdBi |
title_fullStr | Antiferromagnetism and superconductivity in the half-Heusler semimetal HoPdBi |
title_full_unstemmed | Antiferromagnetism and superconductivity in the half-Heusler semimetal HoPdBi |
title_short | Antiferromagnetism and superconductivity in the half-Heusler semimetal HoPdBi |
title_sort | antiferromagnetism and superconductivity in the half-heusler semimetal hopdbi |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4700465/ https://www.ncbi.nlm.nih.gov/pubmed/26728755 http://dx.doi.org/10.1038/srep18797 |
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