Kolincio, K. K., Roman, M., Garmroudi, F., Parzer, M., Bauer, E., & Michor, H. (2024). Charge density wave, enhanced mobility, and large nonsaturating magnetoresistance across the magnetic states of HoNiC2 and ErNiC2. Physical Review B, 109(7), Article 075154. https://doi.org/10.1103/PhysRevB.109.075154
E138-03 - Forschungsbereich Functional and Magnetic Materials
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Journal:
Physical Review B
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ISSN:
2469-9950
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Date (published):
23-Feb-2024
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Number of Pages:
12
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Publisher:
AMER PHYSICAL SOC
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Peer reviewed:
Yes
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Keywords:
Charge Density Wave; Antiferromagnetism; Hall Effect
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Abstract:
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 10^3 cm^2V^−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.
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Project (external):
Polish National Agency for Academic Exchange OeAD Gdansk University of Technology