Cargando…

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...

Descripción completa

Detalles Bibliográficos
Autores principales: Pavlosiuk, Orest, Kaczorowski, Dariusz, Fabreges, Xavier, Gukasov, Arsen, Wiśniewski, Piotr
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2016
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
_version_ 1782408324955766784
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
work_keys_str_mv AT pavlosiukorest antiferromagnetismandsuperconductivityinthehalfheuslersemimetalhopdbi
AT kaczorowskidariusz antiferromagnetismandsuperconductivityinthehalfheuslersemimetalhopdbi
AT fabregesxavier antiferromagnetismandsuperconductivityinthehalfheuslersemimetalhopdbi
AT gukasovarsen antiferromagnetismandsuperconductivityinthehalfheuslersemimetalhopdbi
AT wisniewskipiotr antiferromagnetismandsuperconductivityinthehalfheuslersemimetalhopdbi