Charge density wave, enhanced mobility, and large nonsaturating magnetoresistance across the magnetic states of HoNiC2 and ErNiC2

作     者：Kamil K. Kolincio Marta Roman Fabian Garmroudi Michael Parzer Ernst Bauer Herwig Michor 

作者机构：Faculty of Applied Physics and Mathematics Gdansk University of Technology Narutowicza 11/12 80-233 Gdansk Poland Institute of Solid State Physics TU Wien Wiedner Hauptstrasse 8–10 A-1040 Wien Austria Institute of Physics and Applied Computer Science Faculty of Applied Physics and Mathematics and Advanced Materials Center Gdansk University of Technology Narutowicza 11/12 80-233 Gdansk Poland 

出 版 物：《Physical Review B》 (物理学评论B辑：凝聚态物质与材料物理学)

年 卷 期：2024年第109卷第7期

页      面：075154-075154页

核心收录：

学科分类：07[理学] 0702[理学-物理学] 

基　　金：Gdansk University of Technology 

主　　题：Antiferromagnetism Charge density waves Ferromagnetism Hall effect Magnetism Magnetoresistance Magnetotransport Metamagnetism Nesting Peierls transition Thermopower Antiferromagnets Ferromagnets Metals Polycrystalline materials Strongly correlated systems Hall bar Resistivity measurements Transport techniques 

摘      要：We report on magnetotransport and thermoelectric properties of two ternary carbides HoNiC2 and ErNiC2 hosting both charge density wave and long-range magnetic order. In the charge density wave state, both compounds show relatively large magnetoresistance MR ≈ 150% in HoNiC2 and ≈70% in ErNiC2 at a magnetic field of 9 T and temperature as low as 2 K. This positive field-linear magnetoresistance shows no signatures of saturation. Our combined analysis of diagonal and off-diagonal transport responses reveals electronic mobility values on the order of 103cm2V−1s−1 at 2 K. Both the elevated mobility and related enhanced magnetoresistance persist in the zero-field antiferromagnetic ground state and survive the field-induced crossovers through metamagnetic to field-aligned ferromagnetic states. The robustness of the high-mobility Fermi surface pockets across the magnetically ordered states suggests that the charge density wave is not suppressed but coexists with long-range magnetism in the entire dome of the magnetically ordered states.