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Energy-gap driven low-temperature magnetic and transport properties in Cr1/3MS2(M = Nb, Ta)
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Hicken, T. J., Hawkhead, Z., Wilson, M. N., Huddart, B. M., Hall, A. E., Balakrishnan, Geetha, Wang, C., Pratt, F. L., Clark, S. J. and Lancaster, T. (2022) Energy-gap driven low-temperature magnetic and transport properties in Cr1/3MS2(M = Nb, Ta). Physical Review B, 105 (6). L060407. doi:10.1103/PhysRevB.105.L060407
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WRAP-Energy-gap-driven-low-temperature-magnetic-transport-Cr1-3MS2-M-Nb-Ta-2022.pdf - Published Version - Requires a PDF viewer. Download (849Kb) | Preview |
Official URL: http://dx.doi.org/10.1103/PhysRevB.105.L060407
Abstract
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 stabilized as the majority phase.
| Item Type: | Journal Article | |||||||||||||||
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| Subjects: | Q Science > QC Physics Q Science > QD Chemistry |
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| Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | |||||||||||||||
| Library of Congress Subject Headings (LCSH): | Transition metals , Transition metals -- Magnetic properties, Transition metals -- Transport properties , Muon spin rotation, Magnetic materials , Muons | |||||||||||||||
| Journal or Publication Title: | Physical Review B | |||||||||||||||
| Publisher: | American Physical Society | |||||||||||||||
| ISSN: | 2469-9950 | |||||||||||||||
| Official Date: | 1 February 2022 | |||||||||||||||
| Dates: |
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| Volume: | 105 | |||||||||||||||
| Number: | 6 | |||||||||||||||
| Article Number: | L060407 | |||||||||||||||
| DOI: | 10.1103/PhysRevB.105.L060407 | |||||||||||||||
| Status: | Peer Reviewed | |||||||||||||||
| Publication Status: | Published | |||||||||||||||
| Access rights to Published version: | Restricted or Subscription Access | |||||||||||||||
| Copyright Holders: | ©2022 American Physical Society | |||||||||||||||
| RIOXX Funder/Project Grant: |
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