Unconventional magneto-transport in ultrapure PdCoO2 and PtCoO2
Nabhanila Nandi, Thomas Scaffidi, Pallavi Kushwaha, Seunghyun Khim,, Mark E. Barber, Veronika Sunko, Federico Mazzola, Philip D. C. King, Helge, Rosner, Philip J. W. Moll, Markus K\"onig, Joel E. Moore, Sean Hartnoll and, Andrew P. Mackenzie
TL;DR
This paper investigates unusual magneto-transport phenomena in ultra-pure PdCoO2 and PtCoO2, revealing strong temperature-dependent Hall resistivity and violations of classical rules, suggesting unconventional underlying mechanisms.
Contribution
It provides new insights into magneto-transport in high-purity, quasi-two-dimensional metals, highlighting deviations from standard theories and proposing alternative explanations.
Findings
Strong temperature dependence of Hall resistivity
Violation of Kohler's rule in magnetoresistance
Discussion of unconventional transport contributions
Abstract
We have studied magneto transport in the single-band, quasi-two-dimensional metals PdCoO2 and PtCoO2, which have extremely long mean free paths. We observer a strong temperature dependence of the Hall resistivity in small applied, fields, linked to a large violation of Kohler's rule in the magnetoresistance. We discuss the extent to which these observations can be accounted for by standard transport theory, and describe other possible, unconventional contributions to magnetotransport in very high purity metals.
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