Correlated Thermoelectric Transport and Magnetic Ordering in Eu₅In₂Sb₆
ORAL
Abstract
Recently, many magnetic metals have been found to exhibit large anomalous Hall and Nernst effects (AHE/ANE) originating from Berry curvature. Theory further predicts that the ANE can be strongly enhanced when the carrier density is very low. Despite this expectation, experimental studies in the low-carrier regime remain scarce due to the lack of suitable materials. To address this challenge, we investigated the thermoelectric transport properties of Eu₅In₂Sb₆ single crystals, which undergo a field-induced insulator-to-metal transition. Temperature- and field-dependent measurements of the Seebeck and Nernst coefficients reveal pronounced sensitivity to antiferromagnetic ordering, with variations exceeding a few orders of magnitude. These results identify Eu₅In₂Sb₆ as a promising platform to explore correlated thermoelectric phenomena and to search for an optimal balance between electrical conductivity and thermoelectric response for achieving a high power factor.
*A part of this work was performed at Los Alamos National Laboratory under the auspices of the U.S. Department of Energy, Office of Basic Energy Sciences, Division of Materials Science and Engineering.
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Presenters
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Jui-Lin Chin
- University of Virginia