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Magnetotransport properties in van der Waals RTe3 (R=La, Ce, Tb)
Rare-earth tritellurides are van-der-Waals antiferromagnets which have been attracting attention as materials not only with high mobility, but also with various states such as superconductivity under high pressure, incommensurate charge-density-wave (CDW) phase, and multiple antiferromagnetic phases. In this work, we performed longitudinal resistivity and Hall resistivity measurements simultaneously in exfoliated RTe3 (R =La, Ce, Tb) thin film devices, in order to investigate the influence of magnetic ordering on transport properties in van-der-Waals magnetic materials. We have obtained carrier mobility and concentration using a two-band model, and have observed an increase in carrier mobility in the antiferromagnets CeTe3 and TbTe3 due to the magnetic tran- sition. Especially in CeTe3, the carrier concentration has changed drastically below the magnetic transition temperature, suggesting the interaction between the CDW and antiferromagnetic phases. In addition, the analysis of the Shubnikov-de Haas oscillations in CeTe3 supports the possibility of Fermi surface modulation by magnetic ordering. This research will pave the way not only for spintronic devices that take advantage of high mobility, but also for the study of the correlation between CDW and magnetism states in low-dimensional materials.
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- 02/04/2024
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PhysRevB.109.134404.pdf | 1.87 MB | MDR Open |
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