Semiconducting transport in Pb$_{10-x}$Cu$_x$(PO$_4$)$_6$O sintered from Pb$_2$SO$_5$ and Cu$_3$P

Li Liu; Ziang Meng; Xiaoning Wang; Hongyu Chen; Zhiyuan Duan; Xiaorong Zhou; Han Yan; Peixin Qin; Zhiqi Liu

doi:10.1002/adfm.202308938

paper

Semiconducting transport in Pb $_{10 - x}$ Cu $_{x}$ (PO $_{4}$ ) $_{6}$ O sintered from Pb $_{2}$ SO $_{5}$ and Cu $_{3}$ P

arXiv:2307.16802 · doi:10.1002/adfm.202308938

Abstract

The very recent claim on the discovery of ambient-pressure room-temperature superconductivity in modified lead-apatite has immediately excited sensational attention in the entire society, which is fabricated by sintering lanarkite (Pb2SO5) and copper(I) phosphide (Cu $_{3}$ P). To verify this exciting claim, we have successfully synthesized Pb $_{2}$ SO $_{5}$ , Cu $_{3}$ P, and finally the modified lead-apatite Pb $_{10 - x}$ Cu $_{x}$ (PO $_{4}$ ) $_{6}$ O. Detailed electrical transport and magnetic properties of these compounds were systematically analyzed. It turns out that Pb $_{2}$ SO $_{5}$ is a highly insulating diamagnet with a room-temperature resistivity of ~7.18x10 $^{9}$ Ohm.cm and Cu $_{3}$ P is a paramagnetic metal with a room-temperature resistivity of ~5.22x10 $^{- 4}$ Ohm.cm. In contrast to the claimed superconductivity, the resulting Pb $_{10 - x}$ Cu $_{x}$ (PO $_{4}$ ) $_{6}$ O compound sintered from Pb $_{2}$ SO $_{5}$ and Cu $_{3}$ P exhibits semiconductor-like transport behavior with a large room-temperature resistivity of ~1.94x10 $^{4}$ Ohm.cm although our compound shows greatly consistent x-ray diffraction spectrum with the previously reported structure data. In addition, when a pressed Pb $_{10 - x}$ Cu $_{x}$ (PO $_{4}$ ) $_{6}$ O pellet is located on top of a commercial Nd $_{2}$ Fe $_{14}$ B magnet at room temperature, no repulsion could be felt and no magnetic levitation was observed either. These results imply that the claim of a room-temperature superconductor in modified lead-apatite may need more careful re-examination, especially for the electrical transport properties.

12 pages, 13 figures

Semiconducting transport in Pb $_{10 - x}$ Cu $_{x}$ (PO $_{4}$ ) $_{6}$ O sintered from Pb $_{2}$ SO $_{5}$ and Cu $_{3}$ P

Abstract

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Cited by in corpus (6)

Semiconducting transport in Pb10−x​Cux​(PO4​)6​O sintered from Pb2​SO5​ and Cu3​P

Abstract

References in corpus (4)

Cited by in corpus (6)

Semiconducting transport in Pb $_{10 - x}$ Cu $_{x}$ (PO $_{4}$ ) $_{6}$ O sintered from Pb $_{2}$ SO $_{5}$ and Cu $_{3}$ P