Replication and study of anomalies in LK-99--the alleged ambient-pressure, room-temperature superconductor
T. Habamahoro (1, 2), T. Bontke (1, 2), M. Chirom (2, 3), Z., Wu (1, 2), J. M. Bao (2, 3, 4), L. Z. Deng (1, 2), C. W. Chu (1, and 2) ((1) Department of Physics, University of Houston, Houston, Texas,, USA, (2) Texas Center for Superconductivity at the University of Houston
TL;DR
This study replicates previous claims about LK-99's superconductivity but finds that observed anomalies are due to impurity-related structural transitions, not superconductivity.
Contribution
It provides a critical replication and analysis, clarifying that anomalies are caused by impurities rather than superconductivity in LK-99.
Findings
Anomalies linked to Cu$_2$S impurity structural transition
No evidence of superconductivity in replicated samples
Impurities explain observed magnetic and electric anomalies
Abstract
We have studied LK-99 [PbCu(PO)O], alleged by Lee et al. to exhibit superconductivity above room temperature and at ambient pressure, and have reproduced all anomalies in electric and magnetic measurements that they reported as evidence for the claim of LK-99 being an ambient-pressure, room-temperature superconductor. We found that these anomalies are associated with the structural transition of the CuS impurity in their sample and not with superconductivity.
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Taxonomy
TopicsInorganic Fluorides and Related Compounds · Transition Metal Oxide Nanomaterials · X-ray Diffraction in Crystallography