Observation of Conventional Near Room Temperature Superconductivity in Carbonaceous Sulfur Hydride

Pasan, Hiranya; Snider, Elliot; Munasinghe, Sasanka; Dissanayake, Sachith; Salke, Nilesh P.; Ahart, Muhtar; Khalvashi-Sutter, Nugzari; Dasenbrock-Gammon, Nathan; McBride, R. A.; Smith, G. Alexander; Mostafaeipour, Faraz; Smith, D. F.; Villa-Cortés, S.; Xiao, Yuming; Kenney‐Benson, Curtis; Park, Changyong; Prakapenka, Vitali B.; Chariton, Stella; Lawler, Keith V.; Somayazulu, Maddury; Liu, Zhenxian; Hemley, Russell J.; Salamat, Ashkan; Dias, Ranga

doi:10.48550/arxiv.2302.08622

Cited by 6 publications

(7 citation statements)

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“…After the session, a few attending researchers-all collaborators of Dias-spoke with Physics Magazine, telling us that they disagreed with Hirsch's cherry-picking conclusion. One of them, Russell Hemley of the University of Illinois Chicago confirmed Pasan's claim that they have replicated the 2020 carbonaceous sulfur hydride-as reported in an arXiv paper that the team recently posted [3].…”

Section: Physicists Have Long Touted the Technological Revolutions Th...mentioning

confidence: 87%

Muted Response to New Claim of a Room-Temperature Superconductor

Chen¹

2023

Physics

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Section: Physicists Have Long Touted the Technological Revolutions Th...mentioning

confidence: 87%

Muted Response to New Claim of a Room-Temperature Superconductor

Chen¹

2023

Physics

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“…In considering the isotopic effects here, isotopic effects may give sound scientific basis for why researchers have had tough time replicating the carbonaceous hydride work of Dias [17]. Carbon has two stable isotopes in larger relative abundances: 12 C and 13 C. The 12 C makes up 99% of carbon by relative abundance on earth.…”

Section: Possible Similar Isotopic Effects For Carbonaceous Hydride C...mentioning

confidence: 99%

“…Then in 2019 near room temperature superconductivity was discovered in high pressure lanthanum superhydride [15,16]. Then in 2020 superconductivity was reported in carbonaceous sulfur hydride [17]. Then in 2019 near room temperature superconductivity was reported in yttrium superhydride [18,19].…”

Section: Introductionmentioning

confidence: 99%

Near Ambient Superconductivity by 15N as Needles in the Haystack: Lower Temperatures and Pressures for Possible 15N Enrichment in LuH2

Little

2023

EJPHYSICS

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The author has previously noted the effects of stable isotopes having different nuclear magnetic moments on chemistry, catalysis, biochemistry, thermodynamics, optics, superconductivity and more [1]. In this controversy surrounding reported room temperature superconductivity at near ambient pressures by nitrogen doped lutetium hydride, the author hopes to convince and reason that the different synthesis conditions of the original work of Dias and coworkers [2] at low temperature, mild pressures, diamond anvil cell compression and prolong annealing may lead to selective doping of the lutetium hydride by 15N. The later attempted replication of Dias and coworkers by Hai-hu Wen and coworkers [3] may have caused different outcomes as Hai-hu Wen and coworkers appeared to try Dias work and then switched to a different synthetic method whereby Wen and coworkers instead applied high pressures and high temperatures to the reacting hydrogen, nitrogen and lutetium to produce a nitrogen doped lutetium hydride with similar lattice structure as the originally reported by Dias and coworkers [2] but lacking observed superconductivity and evidence of superconductivity by diamagnetism. The author here by his theory notes the possibility that the different later high pressure, high temperature synthesis by Wen and coworkers doped their sample with 14N rather than 15N as originally enriched in Dias’s sample. Thereby the author notes by his theory [1] that whereas 15N doped lutetium hydride manifests higher superconductivity due to its negative nuclear magnetic moment (NMM), the 14N doped lutetium hydride should not manifest superconductivity at the higher temperatures due to its positive NMM.

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“…"It's a tricky synthetic procedure, and it often doesn't work," says Russell Hemley, a condensed-matter physicist at the University of Illinois Chicago. Hemley collaborated with Dias on a recent CSH experiment [10]. "You have to get the initial pressures just right and use the right laser power and so on," he says.…”

Section: Failure To Replicate Cshmentioning

confidence: 99%

Allegations of Scientific Misconduct Mount as Physicist Makes His Biggest Claim Yet

Garisto¹

2023

Physics

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Observation of Conventional Near Room Temperature Superconductivity in Carbonaceous Sulfur Hydride

Cited by 6 publications

References 0 publications

Muted Response to New Claim of a Room-Temperature Superconductor

Muted Response to New Claim of a Room-Temperature Superconductor

Near Ambient Superconductivity by 15N as Needles in the Haystack: Lower Temperatures and Pressures for Possible 15N Enrichment in LuH2

Allegations of Scientific Misconduct Mount as Physicist Makes His Biggest Claim Yet

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