First order transition in Pb$_{10-x}$Cu$_x$(PO$_4$)$_6$O ($0.9<x<1.1$) containing Cu$_2$S

Shilin Zhu; Wei Wu; Zheng Li; Jianlin Luo

doi:10.1016/j.matt.2023.11.001

paper

First order transition in Pb $_{10 - x}$ Cu $_{x}$ (PO $_{4}$ ) $_{6}$ O ( $0.9 < x < 1.1$ ) containing Cu $_{2}$ S

arXiv:2308.04353 · doi:10.1016/j.matt.2023.11.001

Abstract

Lee et al. reported that the compound LK99, with a chemical formula of Pb $_{10 - x}$ Cu $_{x}$ (PO $_{4}$ ) $_{6}$ O ( $0.9 < x < 1.1$ ), exhibits room-temperature superconductivity under ambient pressure. In this study, we investigated the transport and magnetic properties of pure Cu $_{2}$ S and LK-99 containing Cu $_{2}$ S. We observed a sharp superconducting-like transition and a thermal hysteresis behavior in the resistivity and magnetic susceptibility. However, we did not observe zero-resistivity below the transition temperature. We argue that the so-called superconducting behavior in LK-99 is most likely due to a reduction in resistivity caused by the first order structural phase transition of Cu $_{2}$ S at around 385 K, from the $β$ phase at high temperature to the $γ$ phase at low temperature.

First order transition in Pb $_{10 - x}$ Cu $_{x}$ (PO $_{4}$ ) $_{6}$ O ( $0.9 < x < 1.1$ ) containing Cu $_{2}$ S

Abstract

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First order transition in Pb10−x​Cux​(PO4​)6​O (0.9<x<1.1) containing Cu2​S

Abstract

References in corpus (4)

Cited by in corpus (8)

First order transition in Pb $_{10 - x}$ Cu $_{x}$ (PO $_{4}$ ) $_{6}$ O ( $0.9 < x < 1.1$ ) containing Cu $_{2}$ S