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 TN = 1.9 K and exhibits superconductivity below Tc = 0.7 K, which was confirmed by magnetic,...

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Main Authors:	Pavlosiuk, Orest, Kaczorowski, Dariusz, Fabreges, Xavier, Gukasov, Arsen, Wiśniewski, Piotr
Format:	Online
Language:	English
Published:	Nature Publishing Group 2016
Online Access:	https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4700465/

id	pubmed-4700465
recordtype	oai_dc
spelling	pubmed-47004652016-01-13 Antiferromagnetism and superconductivity in the half-Heusler semimetal HoPdBi Pavlosiuk, Orest Kaczorowski, Dariusz Fabreges, Xavier Gukasov, Arsen Wiśniewski, Piotr 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 TN = 1.9 K and exhibits superconductivity below Tc = 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 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/
repository_type	Open Access Journal
institution_category	Foreign Institution
institution	US National Center for Biotechnology Information
building	NCBI PubMed
collection	Online Access
language	English
format	Online
author	Pavlosiuk, Orest Kaczorowski, Dariusz Fabreges, Xavier Gukasov, Arsen Wiśniewski, Piotr
spellingShingle	Pavlosiuk, Orest Kaczorowski, Dariusz Fabreges, Xavier Gukasov, Arsen Wiśniewski, Piotr Antiferromagnetism and superconductivity in the half-Heusler semimetal HoPdBi
author_facet	Pavlosiuk, Orest Kaczorowski, Dariusz Fabreges, Xavier Gukasov, Arsen Wiśniewski, Piotr
author_sort	Pavlosiuk, Orest
title	Antiferromagnetism and superconductivity in the half-Heusler semimetal HoPdBi
title_short	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_sort	antiferromagnetism and superconductivity in the half-heusler semimetal hopdbi
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 TN = 1.9 K and exhibits superconductivity below Tc = 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 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.
publisher	Nature Publishing Group
publishDate	2016
url	https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4700465/
_version_	1613519681984921600

Antiferromagnetism and superconductivity in the half-Heusler semimetal HoPdBi

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