tag:blogger.com,1999:blog-13869903.post4604005123223145242..comments2024-03-28T04:15:44.459-05:00Comments on nanoscale views: Room temperature superconductivity!Douglas Natelsonhttp://www.blogger.com/profile/13340091255404229559noreply@blogger.comBlogger8125tag:blogger.com,1999:blog-13869903.post-89042511563090853662023-07-31T20:46:10.466-05:002023-07-31T20:46:10.466-05:00C C C C C C C
C C C C C C ...C C C C C C C<br /> C C C C C C C C<br /> C C C C C C C<br /> C C C C C C C C<br /> C C C C C C C<br /> C C C C C C C C<br /> C C C C C C C<br /> C C C C C C C C<br /> C C C C C C CAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-13869903.post-52330067998919290902023-07-31T20:38:58.101-05:002023-07-31T20:38:58.101-05:00(HTS) x (C6) y(HTS) x (C6) yAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-13869903.post-57844306234029292962023-07-31T20:27:47.100-05:002023-07-31T20:27:47.100-05:00C10−10−xCux(PO4)4O6-y(CuO2)zC10−10−xCux(PO4)4O6-y(CuO2)zAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-13869903.post-86191153798982268022020-10-24T10:50:08.951-05:002020-10-24T10:50:08.951-05:00Anon, I just saw that myself. That's a very i...Anon, I just saw that myself. That's a very interesting observation about the data, and it absolutely requires further scrutiny. In previous discussions about purported observations of zero resistance states in various granular things (e.g. <a href="http://nanoscale.blogspot.com/2019/06/round-up-of-various-links.html" rel="nofollow">here</a>), the question of artifacts due to inhomogeneous current has been discussed. The diamagnetism would be a heck of a coincidence. I need to read more carefully, and it would be great to hear from the authors on this.Douglas Natelsonhttps://www.blogger.com/profile/13340091255404229559noreply@blogger.comtag:blogger.com,1999:blog-13869903.post-4682274165563591692020-10-24T04:37:03.322-05:002020-10-24T04:37:03.322-05:00Any thoughts on the comment by Hirsch and Marsigli...Any thoughts on the comment by Hirsch and Marsiglio (arXiv:2010.10307). I personally hadn't realised that the transitions were anomalously sharp, and that this was an issue.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-13869903.post-9068067120441560392020-10-16T08:20:48.576-05:002020-10-16T08:20:48.576-05:00Anon, yes, that's the basic idea. One way to ...Anon, yes, that's the basic idea. One way to view this: It's now established that some configuration of atoms can give the right pairing strength and coherence properties to stabilize superconductivity at room temperature. Is there a way to achieve those parameters without squeezing the ever-loving heck out of something? Your metastability point is also right on target. Ashcroft's original work suggested that metallic H could be metastable at ambient pressure, though later Salpeter <a href="https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.28.560" rel="nofollow">showed</a> that the situation is bleak at room temperature.Douglas Natelsonhttps://www.blogger.com/profile/13340091255404229559noreply@blogger.comtag:blogger.com,1999:blog-13869903.post-81202946565164814192020-10-15T09:32:11.924-05:002020-10-15T09:32:11.924-05:00I think the argument is that there might be a meta...I think the argument is that there might be a metastable phase out there which can be quenched, like diamond. Or perhaps some sort of composite/inclusion compound?Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-13869903.post-83066276144096338552020-10-15T04:52:19.949-05:002020-10-15T04:52:19.949-05:00"Is there any pathway to keeping these proper..."Is there any pathway to keeping these properties without enormous externally applied pressure?"<br /><br />Isn't it an intrinsic requirement of this technology? It seems to me we would likely be more successful looking for superconductivity using different technology, than trying to find practical applications (outside labs) to these diamond anvils.<br />dlbhttps://www.blogger.com/profile/00647687145267016748noreply@blogger.com