Putative Hall response of the strange metal component in FeSe_{1−x}S_{x}

Strange metals possess transport properties that are markedly different from those of a conventional Fermi liquid. Despite strong similarities in behavior exhibited by distinct families, a consistent description of strange metallic transport and, in particular, its evolution from low to high magneti...

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Bibliographic Details
Main Authors: M. Čulo, M. Berben, Y.-T. Hsu, J. Ayres, R. D. H. Hinlopen, S. Kasahara, Y. Matsuda, T. Shibauchi, N. E. Hussey
Format: Article
Language:English
Published: American Physical Society 2021-04-01
Series:Physical Review Research
Online Access:http://doi.org/10.1103/PhysRevResearch.3.023069
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Summary:Strange metals possess transport properties that are markedly different from those of a conventional Fermi liquid. Despite strong similarities in behavior exhibited by distinct families, a consistent description of strange metallic transport and, in particular, its evolution from low to high magnetic field strength H, is still lacking. The electron nematic FeSe_{1−x}S_{x} is one such strange metal displaying anomalous H/T scaling in its transverse magnetoresistance as well as a separation of transport and Hall lifetimes at low H beyond its (nematic) quantum critical point at x_{c}∼0.17. Here we report a study of the Hall response of FeSe_{1−x}S_{x} across x_{c} in fields up to 33 T. Upon subtraction of a normal H-linear component from the total Hall response (imposed by perfect charge compensation), we find a second component, ascribable to strange metal physics, that grows as 1/T upon approach to the quantum critical point. Through this decomposition, we reveal that lifetime separation is indeed driven primarily by the presence of the strange metal component.
ISSN:2643-1564