No evidence of superconductivity in a compressed sample prepared from lutetium foil and H2/N2 gas mixture
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 o...
| Main Authors: | , , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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AIP Publishing LLC
2023-07-01
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| Series: | Matter and Radiation at Extremes |
| Online Access: | http://dx.doi.org/10.1063/5.0153447 |
| _version_ | 1797771765564309504 |
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| author | Shu Cai Jing Guo Haiyun Shu Liuxiang Yang Pengyu Wang Yazhou Zhou Jinyu Zhao Jinyu Han Qi Wu Wenge Yang Tao Xiang Ho-kwang Mao Liling Sun |
| author_facet | Shu Cai Jing Guo Haiyun Shu Liuxiang Yang Pengyu Wang Yazhou Zhou Jinyu Zhao Jinyu Han Qi Wu Wenge Yang Tao Xiang Ho-kwang Mao Liling Sun |
| author_sort | Shu Cai |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-03-12T21:41:27Z |
| format | Article |
| id | doaj.art-75eecd5e5a244f7f851e38a9177858a8 |
| institution | Directory Open Access Journal |
| issn | 2468-080X |
| language | English |
| last_indexed | 2024-03-12T21:41:27Z |
| publishDate | 2023-07-01 |
| publisher | AIP Publishing LLC |
| record_format | Article |
| series | Matter and Radiation at Extremes |
| spelling | doaj.art-75eecd5e5a244f7f851e38a9177858a82023-07-26T17:47:21ZengAIP Publishing LLCMatter and Radiation at Extremes2468-080X2023-07-0184048001048001-510.1063/5.0153447No evidence of superconductivity in a compressed sample prepared from lutetium foil and H2/N2 gas mixtureShu Cai0Jing Guo1Haiyun Shu2Liuxiang Yang3Pengyu Wang4Yazhou Zhou5Jinyu Zhao6Jinyu Han7Qi Wu8Wenge Yang9Tao Xiang10Ho-kwang Mao11Liling Sun12Institute of Physics, Chinese Academy of Sciences, Beijing 100190, ChinaInstitute of Physics, Chinese Academy of Sciences, Beijing 100190, ChinaCenter for High Pressure Science and Technology Advanced Research, 100094 Beijing, ChinaCenter for High Pressure Science and Technology Advanced Research, 100094 Beijing, ChinaInstitute of Physics, Chinese Academy of Sciences, Beijing 100190, ChinaInstitute of Physics, Chinese Academy of Sciences, Beijing 100190, ChinaInstitute of Physics, Chinese Academy of Sciences, Beijing 100190, ChinaInstitute of Physics, Chinese Academy of Sciences, Beijing 100190, ChinaInstitute of Physics, Chinese Academy of Sciences, Beijing 100190, ChinaCenter for High Pressure Science and Technology Advanced Research, 100094 Beijing, ChinaInstitute of Physics, Chinese Academy of Sciences, Beijing 100190, ChinaCenter for High Pressure Science and Technology Advanced Research, 100094 Beijing, ChinaInstitute of Physics, Chinese Academy of Sciences, Beijing 100190, ChinaA 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.http://dx.doi.org/10.1063/5.0153447 |
| spellingShingle | Shu Cai Jing Guo Haiyun Shu Liuxiang Yang Pengyu Wang Yazhou Zhou Jinyu Zhao Jinyu Han Qi Wu Wenge Yang Tao Xiang Ho-kwang Mao Liling Sun No evidence of superconductivity in a compressed sample prepared from lutetium foil and H2/N2 gas mixture Matter and Radiation at Extremes |
| title | No evidence of superconductivity in a compressed sample prepared from lutetium foil and H2/N2 gas mixture |
| title_full | No evidence of superconductivity in a compressed sample prepared from lutetium foil and H2/N2 gas mixture |
| title_fullStr | No evidence of superconductivity in a compressed sample prepared from lutetium foil and H2/N2 gas mixture |
| title_full_unstemmed | No evidence of superconductivity in a compressed sample prepared from lutetium foil and H2/N2 gas mixture |
| title_short | No evidence of superconductivity in a compressed sample prepared from lutetium foil and H2/N2 gas mixture |
| title_sort | no evidence of superconductivity in a compressed sample prepared from lutetium foil and h2 n2 gas mixture |
| url | http://dx.doi.org/10.1063/5.0153447 |
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