No evidence of superconductivity in a compressed sample prepared from lutetium foil and H<sub>2</sub>/N<sub>2</sub> gas mixture

Cai Shu; Guo Jing; Shu Haiyun; Yang Liuxiang; Wang Pengyu; Zhou Yazhou; Zhao Jinyu; Han Jinyu; Wu Qi; Yang Wenge; Xiang Tao; Mao Ho-kwang; Sun Liling

doi:10.1063/5.0153447

Volume 8 Issue 4

Jul. 2023

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Article Navigation > Matter and Radiation at Extremes > 2023 > 8(4): 048001

Cai Shu, Guo Jing, Shu Haiyun, Yang Liuxiang, Wang Pengyu, Zhou Yazhou, Zhao Jinyu, Han Jinyu, Wu Qi, Yang Wenge, Xiang Tao, Mao Ho-kwang, Sun Liling. No evidence of superconductivity in a compressed sample prepared from lutetium foil and H2/N2 gas mixture[J]. Matter and Radiation at Extremes, 2023, 8(4): 048001. doi: 10.1063/5.0153447

Citation:

Cai Shu, Guo Jing, Shu Haiyun, Yang Liuxiang, Wang Pengyu, Zhou Yazhou, Zhao Jinyu, Han Jinyu, Wu Qi, Yang Wenge, Xiang Tao, Mao Ho-kwang, Sun Liling. No evidence of superconductivity in a compressed sample prepared from lutetium foil and H₂/N₂ gas mixture[J]. Matter and Radiation at Extremes, 2023, 8(4): 048001. doi: 10.1063/5.0153447

Citation:

Cai Shu, Guo Jing, Shu Haiyun, Yang Liuxiang, Wang Pengyu, Zhou Yazhou, Zhao Jinyu, Han Jinyu, Wu Qi, Yang Wenge, Xiang Tao, Mao Ho-kwang, Sun Liling. No evidence of superconductivity in a compressed sample prepared from lutetium foil and H₂/N₂ gas mixture[J]. Matter and Radiation at Extremes, 2023, 8(4): 048001. doi: 10.1063/5.0153447

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No evidence of superconductivity in a compressed sample prepared from lutetium foil and H₂/N₂ gas mixture

doi: 10.1063/5.0153447

Cai Shu^{1, 2},
Guo Jing¹,
Shu Haiyun²,
Yang Liuxiang²,
Wang Pengyu^{1, 3},
Zhou Yazhou¹,
Zhao Jinyu^{1, 3
,},
Han Jinyu^{1, 3},
Wu Qi^1
,,
Yang Wenge^2
,,
Xiang Tao^{1, 3},
Mao Ho-kwang²,
Sun Liling^{1, 2, 3
,
,
,}

1.
Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
2.
Center for High Pressure Science and Technology Advanced Research, 100094 Beijing, China
3.
University of Chinese Academy of Sciences, Beijing 100190, China

More Information

Corresponding author: a)Author to whom correspondence should be addressed: llsun@iphy.ac.cn
Received Date: 2023-04-08
Accepted Date: 2023-04-24

Available Online: 2023-07-01

Publish Date: 2023-07-01

Abstract

Abstract

A material described as lutetium–hydrogen–nitrogen (Lu-H-N in short) was recently claimed to have “near-ambient superconductivity” [Dasenbrock-Gammon et al., Nature 615 , 244–250 (2023)]. If this result could be reproduced by other teams, it would be a major scientific breakthrough. Here, we report our results of transport and structure measurements on a material prepared using the same method as reported by Dasenbrock-Gammon et al. Our x-ray diffraction measurements indicate that the obtained sample contains three substances: the face-centered-cubic (FCC)-1 phase (Fm-3m) with lattice parameter a = 5.03 Å, the FCC-2 phase (Fm-3m) with a lattice parameter a = 4.755 Å, and Lu metal. The two FCC phases are identical to the those reported in the so-called near-ambient superconductor. However, we find from our resistance measurements in the temperature range from 300 K down to 4 K and the pressure range 0.9–3.4 GPa and our magnetic susceptibility measurements in the pressure range 0.8–3.3 GPa and the temperature range down to 100 K that the samples show no evidence of superconductivity. We also use a laser heating technique to heat a sample to 1800 °C and find no superconductivity in the produced dark blue material below 6.5 GPa. In addition, both samples remain dark blue in color in the pressure range investigated.

The authors have no conflicts to disclose.
Conflict of Interest
Author Contributions
L.S., T.X., Q.W., W.Y., and H.-K.M. designed the study and supervised the project. S.C., J.G., L.S., H.S., W.Y., and L.Y. prepared the samples. S.C. and L.S. performed the high-pressure resistance measurements. P.W., J.Z., and J.H. carried out high-pressure magnetic susceptivity measurements. S.C., L.S., and Y.Z. conducted SEM and EDS measurements. L.S., S.C., Q.W., and W.Y. wrote the manuscript in consultation with all the authors.
Shu Cai: Investigation (equal); Writing – original draft (equal). Jing Guo: Investigation (equal). Haiyun Shu: Investigation (equal). Liuxiang Yang: Investigation (equal). Pengyu Wang: Investigation (equal). Yazhou Zhou: Investigation (equal). Jinyu Zhao: Investigation (equal). Jinyu Han: Investigation (equal). Qi Wu: Investigation (equal); Supervision (equal); Writing – original draft (equal). Wenge Yang: Investigation (equal); Supervision (equal); Writing – review & editing (equal). Tao Xiang: Supervision (equal); Writing – review & editing (equal). Ho-kwang Mao: Supervision (equal); Writing – review & editing (equal). Liling Sun: Investigation (equal); Supervision (equal); Writing – original draft (equal).
S.C. and J.G. contributed equally to this paper.
The data that support the findings of this study are available from the corresponding author upon reasonable request.

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References(20)

References

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