Energy-gap driven low-temperature magnetic and transport properties in Cr1/3MS2 (M = Nb, Ta) [dataset]

Lancaster, T (Durham University, UK); Wang, C (Paul Scherrer Institut, Switzerland); Balakrishnan, G (University of Warwick, UK); Pratt, F (ISIS Neutron and Muon Source, UK); Hawkhead, Z (Durham University, UK); Huddart, B (Durham University, UK); Hall, A (University of Warwick, UK); Hicken, T (Durham University, UK); Wilson, M (Durham University, UK); Clark, S (Durham University, UK)

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Energy-gap driven low-temperature magnetic and transport properties in Cr1/3MS2 (M = Nb, Ta) [dataset] Open Access

The helimagnets Cr1/3MS2 (M = Nb or Ta) have attracted renewed attention due to the discovery of a chiral soliton lattice (CSL) stabilized in an applied magnetic field, but reports of unusual low-temperature transport and magnetic properties in this system lack a unifying explanation. Here, we present electronic structure calculations that demonstrate the materials are half metals. There is also a gaplike feature (width in range 40–100 meV) in the density of states of one spin channel. This electronic structure explains the low-temperature electronic and magnetic properties of Cr1/3MS2 (M = Nb or Ta), with the gaplike feature particularly important for explaining the magnetic behavior. Our magnetometry measurements confirm the existence of this gap. Dynamic spin fluctuations driven by excitations across this gap are seen over a wide range of frequencies (0.1 Hz to MHz) with ac susceptibility and muon-spin relaxation (μ+SR) measurements. We show further how effects due to the CSL in Cr1/3NbS2, as detected with μ+SR, dominate over the gap driven magnetism when the CSL is stabilizedas the majority phase.

Descriptions

Resource type: Dataset
Contributors: Creator: Hicken, T ¹
Creator: Hawkhead, Z ¹
Creator: Wilson, M ¹
Creator: Huddart, B ¹
Creator: Hall, A ²
Creator: Balakrishnan, G ²
Creator: Wang, C ³
Creator: Pratt, F ⁴
Creator: Clark, S ¹
Creator: Lancaster, T ¹
Contact person: Lancaster, T ¹

¹ Durham University, UK
² University of Warwick, UK
³ Paul Scherrer Institut, Switzerland
⁴ ISIS Neutron and Muon Source, UK
Funder: Engineering and Physical Sciences Research Council
Research methods: Density functional theory
Magnetometry
Muon-spin spectroscopy
Other description: In addition to these data, raw data measured at ISIS Neutron and Muon Source can be obtained from the following DOI: https://doi.org/10.5286/ISIS.E.RB2010327
Keyword: AC susceptibility measurements
Muon spin spectroscopy
Electronic structure
Seebeck effect
Chiral magnets
Subject: Physics
Condensed matter
Magnetism
Location
Language: English
Cited in: doi:10.1103/PhysRevB.105.L060407
Identifier: ark:/32150/r25138jd90p
doi:10.15128/r25138jd90p
Rights: Creative Commons Attribution 4.0 International (CC BY)
Publisher: Durham University
Date Created

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Depositor: T.J. Hicken
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User N. Syrotiuk has updated Energy-gap driven low-temperature magnetic and transport properties in Cr1/3MS2 (M = Nb, Ta) [dataset]	about 2 years ago
User N. Syrotiuk has updated Energy-gap driven low-temperature magnetic and transport properties in Cr1/3MS2 (M = Nb, Ta) [dataset]	about 2 years ago
User N. Syrotiuk has updated Energy-gap driven low-temperature magnetic and transport properties in Cr1/3MS2 (M = Nb, Ta) [dataset]	about 2 years ago