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Quasi-linear `non-metallic' resistivity in the distorted-kagome metal CrPdAs

Strongly Correlated Electrons 2026-04-14 v1

Abstract

We report the growth and characterization of single crystals of the disorted-kagome lattice compound CrPdAs. Spin-glass behaviour with TSG60 KT_{SG} \sim 60\ {\rm K} is observed in all crystals tested. Some growths show in addition a magnetic impurity phase with TcT_c around 200 K, but annealing produces single-phase crystals without the ferromagnetic impurity phase. Single-phase crystals nevertheless have 29±5%29\pm 5\% anti-site disorder of the Cr and Pd sites, similar to a previous generation of flux-grown polycrystalline samples. We observe a large linear-coefficient of the heat capacity at low temperature, γ=23±3\gamma = 23 \pm 3 mJ/mole\,K2^2, which is typical of kagome metals. The calculated band structure shows several Dirac band-crossings very near EFE_F whose degeneracy is lifted when spin-orbit interaction is included. Our most curious finding is a `non-metallic' in-plane resistivity, extending over the entire measured temperature range from 300 K down to 2 K. This resistivity is quasi-linear below about 130 K, and shows no sign of saturation down to the lowest temperature measured.

Keywords

Cite

@article{arxiv.2604.11630,
  title  = {Quasi-linear `non-metallic' resistivity in the distorted-kagome metal CrPdAs},
  author = {Benny Lau and Wenlong Wu and Bo Yuan and Julian Nickel and Stephen Julian},
  journal= {arXiv preprint arXiv:2604.11630},
  year   = {2026}
}

Comments

12 pages, 8 figures