The Role of Impurities on the Electronic and Superconducting Properties of NiBi<sub>3</sub>
ORAL
Abstract
Superconductivity in the bismuth-nickel system has been of interest due to both the discovery of triplet p-wave superconductivity in bilayer films and the possible competition between superconductivity and magnetic order that has been measured in single-crystal NiBi3. While previous literature suggests that the presence of amorphous nickel may be the source of the previously reported ferromagnetic order in NiBi3, the effect of bismuth impurities on the electronic properties are rarely addressed. Understanding the role of these extrinsic effects calls for a more careful investigation of the electronic properties of NiBi3. In order to address this, we have grown NiBi3 samples by bismuth flux (as have all previously reported NiBi3 single crystal samples) as well as by chemical vapor transport (CVT). In this talk, we present magnetotransport studies of flux- and CVT-grown NiBi3 samples which reveal large discrepancies in the electronic properties both between samples and between different sections of the same sample that suggest that bismuth impurities play a significant role in the normal state and superconducting properties of NiBi3.
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Presenters
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Jarryd Horn
University of Maryland, College Park
Authors
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Jarryd Horn
University of Maryland, College Park
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Johnpierre Paglione
University of Maryland, College Park, Maryland Quantum Materials Center, University of Maryland, College Park, MD 20742, USA, Univ of Maryland-College Park
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Jihun Park
Department of Materials Science and Engineering, University of Maryland, College Park, MD 20742, USA;, University of Maryland, College Park
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Ichiro Takeuchi
University of Maryland, College Park, Department of Materials Science and Engineering, University of Maryland, College Park, MD 20742, USA
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John C Collini
University of Maryland, College Park