propagation of defects through material

Each and every day I learn something new. I was taught in material science that defects propagate at the speed of sound with a clear scientific reasoning. Now I see that this thesis has been disporved:
DOI: 10.1126/science.adh5563

And a BIG applause for the technique to actually measure the velocity in the diamond!

@Ponderable
Does that mean it is actually faster than the velocity of soundwaves in diamond?
I couldn't get that link to work.

@sonhouse said
@Ponderable
Does that mean it is actually faster than the velocity of soundwaves in diamond?
I couldn't get that link to work.

Ooops sorry, I can access most journals viy my university account...

It was reported here also:

https://phys.org/news/2023-10-defects-diamond-faster.html

or

https://metroamericas.com/en/noticias-2/researchers-discover-that-dislocations-can-propagate-faster-than-sound-waves/168842/

@Ponderable
Have they figured out the physics involved yet?

@sonhouse said
@Ponderable
Have they figured out the physics involved yet?

Not really 🙂 New models are proposed and discussed.

@Ponderable
Could it be something as 'simple' as two velocities for sound transmission?