IRLRPD

Post #425,161 by drook 8/17/18 1:42:45 PM 8/17/18 1:42:45 PM Reply	IRLRPD Yeah, silver can enhance a superconductor, and SrAuSi3 fits into the general AMX3 broken spatial inversion symmetry class of superconductors - but with just silver and gold you don't have that BSIS. https://slashdot.org/comments.pl?sid=12487724&cid=57140602 I think this might be real and not just gobledygook, but I can't be sure. -- Drew
Post #425,162 by Another Scott 8/17/18 3:55:56 PM 8/17/18 3:55:56 PM Reply	Superconductivity is very weird. Bare intuition doesn't help much at all. https://pubs.acs.org/doi/abs/10.1021/cm500032u A novel strontium–gold silicide (SrAuSi3) was successfully synthesized for the first time using a high-pressure technique, at ∼6 GPa. X-ray Rietveld analysis and scanning transmission electron microscopy studies clearly revealed that SrAuSi3 crystallizes in a BaNiSn3-type structure, in space group I4mm with the following lattice parameters: a = 4.4090(1) Å, and c = 9.9475(3) Å. The structure was found not to have inversion symmetry in real space. From direct measurements of polycrystalline SrAuSi3, the electrical resistivity was zero, the static magnetic susceptibility was almost a full volume Meissner diamagnetic signal, and the specific heat exhibited a sharp jump, all of which were accompanied by a phase transition due to bulk superconductivity at a critical temperature (TC) of 1.54 K. The SrAuSi3 compound is the first noncentrosymmetric superconductor that includes Au as a principal constituent element. HTH. Cheers, Scott.
Post #425,166 by malraux 8/18/18 6:27:20 PM 8/18/18 6:35:26 PM Reply	Might be worse than gobbledegook: https://twitter.com/gravity_levity/status/1027717419400392705 They have the exact same pattern of random noise. The blue data points are clearly identical to the green ones; they have only been shifted downward by a constant amount. These are supposed to be two independent measurements, separated in time and in the value of certain parameters. An exactly duplicated pattern of noise is not something you would expect. And then it gets weirder: Today PR received an email from his famous and distinguished colleage TVR, asking him to not criticize Thapa and Pandey (the authors of the original paper), and to be patient. At the bottom of the email was a forwarded friendly discussion between TVR and Pandey. PR replied with a "rather strong response" to TVR, including a cc to TVR's personal email address. Shortly thereafter, he got a phone call from TVR. It turns out that TVR HAD NEVER WRITTEN ANY SUCH EMAIL. Both the email asking PR not to criticize the authors, and the supposed discussion between TVR and Pandey were fabricated by someone pretending to be TVR. Article form of the above: https://www.wired.com/story/the-curious-case-of-a-revolutionary-but-imaginary-superconductor/ Regards, -scott Welcome to Rivendell, Mr. Anderson. Edited by malraux Aug. 18, 2018, 06:35:26 PM EDT Expand All History

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