[HN Gopher] LK-99: Phonon Bands, Localized Flat Band Magnetism, ...
___________________________________________________________________
LK-99: Phonon Bands, Localized Flat Band Magnetism, Models, &
Chemical Analysis
Author : carabiner
Score : 21 points
Date : 2023-08-08 21:11 UTC (1 hours ago)
(HTM) web link (drive.google.com)
(TXT) w3m dump (drive.google.com)
| ayakang31415 wrote:
| As I feared, it is no use at all at this stage to claim anything
| about LK-99 as every synthesized LK-99 seems different each time.
| We have to have a thorough analysis on the sample directly
| provided by Lee and Kim.
| carabiner wrote:
| "Together, these calculations suggest it is doubtful that Cu
| enters the structure in meaningful concentrations, despite
| initial attempts to model LK-99 in this way."
|
| So does this mean all those DFT calculations were useless?
| denhaus wrote:
| It may mean the structure of LK-99 found by Kim et al is highly
| metastable. It does not mean the DFT calculations were useless.
| Also, for clarity, the original DFT calculations by Griffin do
| not purport to have "verified" superconductivity, but rather
| just report to have found a band structure (electronic energy
| levels) which are encouraging.
| dmarchand90 wrote:
| Damn, looks like it's a no then :(
| denhaus wrote:
| I wouldn't say a "no", just a failed replication. Though it's
| not encouraging
| jacquesm wrote:
| No, it's not a yes. And it could easily stay that way.
| carabiner wrote:
| X link with findings summary (not a superconductor):
| https://nitter.net/i/status/1689014160477261825
___________________________________________________________________
(page generated 2023-08-08 23:00 UTC)