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...
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Veröffentlicht in: | Matter and radiation at extremes 2023-07, Vol.8 (4), p.76-80 |
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creator | 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 |
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. |
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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.</description><identifier>ISSN: 2468-2047</identifier><identifier>ISSN: 2468-080X</identifier><identifier>EISSN: 2468-080X</identifier><identifier>DOI: 10.1063/5.0153447</identifier><identifier>CODEN: MREAE5</identifier><language>eng</language><publisher>University of Chinese Academy of Sciences,Beijing 100190,China%Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China</publisher><ispartof>Matter and radiation at extremes, 2023-07, Vol.8 (4), p.76-80</ispartof><rights>Author(s)</rights><rights>Copyright © Wanfang Data Co. Ltd. All Rights Reserved.</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c439t-a3241b2ef9bae1a244c5044df808315db82038c33590cb4d3c2e730d5851b7203</citedby><cites>FETCH-LOGICAL-c439t-a3241b2ef9bae1a244c5044df808315db82038c33590cb4d3c2e730d5851b7203</cites><orcidid>0000-0002-5871-6234 ; 0000-0001-8436-8731 ; 0000-0002-6653-7826 ; 0009-0000-1996-3569</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Uhttp://www.wanfangdata.com.cn/images/PeriodicalImages/jdtjxdwzyfs-e/jdtjxdwzyfs-e.jpg</thumbnail><link.rule.ids>314,780,784,864,2102,27924,27925</link.rule.ids></links><search><creatorcontrib>Cai, Shu</creatorcontrib><creatorcontrib>Guo, Jing</creatorcontrib><creatorcontrib>Shu, Haiyun</creatorcontrib><creatorcontrib>Yang, Liuxiang</creatorcontrib><creatorcontrib>Wang, Pengyu</creatorcontrib><creatorcontrib>Zhou, Yazhou</creatorcontrib><creatorcontrib>Zhao, Jinyu</creatorcontrib><creatorcontrib>Han, Jinyu</creatorcontrib><creatorcontrib>Wu, Qi</creatorcontrib><creatorcontrib>Yang, Wenge</creatorcontrib><creatorcontrib>Xiang, Tao</creatorcontrib><creatorcontrib>Mao, Ho-kwang</creatorcontrib><creatorcontrib>Sun, Liling</creatorcontrib><title>No evidence of superconductivity in a compressed sample prepared from lutetium foil and H2/N2 gas mixture</title><title>Matter and radiation at extremes</title><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. 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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. 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title | No evidence of superconductivity in a compressed sample prepared from lutetium foil and H2/N2 gas mixture |
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