2024/10/08 by M. A. Anisimov, N. A. Samarin, Anisimov, M. +15
Materials Science · Physics and Astronomy · #FOS: Physical sciences #Magnetic Properties of Alloys #Materials Science (cond-mat.mtrl-sci) #Metallurgical and Alloy Processes #Rare-earth and actinide compounds #Strongly Correlated Electrons (cond-mat.str-el)
paper · pdf · doi:10.48550/arxiv.2410.06110
openalex publication_date 2024/10/08 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Nonmagnetic metal LuB12 is known to exhibit considerable transport anisotropy, which was explained in literature by different mechanisms including possible formation of dynamic charge stripes below the point ∼ 150K. Here we study transport properties of solid solutions based on LuB12 host compound with general formula RxLu1-xB12 (R-Dy, Er, Tm, Yb, Lu) and with x ≤ 0.03. The experiment has been performed on single crystals of high quality in the temperature range 1.8 - 300K in magnetic fields up to 82kOe. The application of several models to the analysis of zero-field resistivity is discussed. A phenomenological description of large positive quadratic component of transverse magnetoresistance Δρ/ρ(H) = μD2H2, which dominates for all compounds under investigation, allows to estimate drift mobility exponential changes μD ∼ T-α with the index α ≈ 0.95 - 1.46. In order to check the existence of additional channel of scattering, caused by probable presence of dynamic charge stripes, we performed the study of the anisotropy of magnetoresistance in Dy0.01Lu0.99B12 and Tm0.03Lu0.97B12 compositions including the measurements of the field scans with different current and field geometries. The data obtained allow us to confirm the fulfillment of semi-empirical Kohler's rule in a wide interval of temperatures 30 - 240K regardless of the orientation of current and magnetic field. This result was attributed as a proof of the absence of additional channel of scattering caused by stripes. We argue, that charge-transport anisotropy is originated in RxLu1-xB12 due to the anisotropy of electron-phonon scattering on the one hand and the effects of Fermi surface (FS) topology (at low temperatures) on the other.