#PinesDemon

Physiker finden „Pines‘ Dämon“. Erster Nachweis eines lange vorhergesagten neutralen, masselosen Elektronenzustands im Metall. #Physik #Metall #Elektron #Plasmon #PinesDemon
https://www.scinexx.de/news/physik/physiker-finden-pines-daemon/

Pines' Demon: Physicists confirm 1956 prediction of massless, neutral composite particle
https://www.sciencedaily.com/releases/2023/08/230818004752.htm
Discussion: https://www.sciencedaily.com/releases/2023/08/230818004752.htm

Pines’ demon observed as 3D acoustic plasmon in Sr2RuO4
https://www.nature.com/articles/s41586-023-06318-8

Pines' demon: https://en.wikipedia.org/wiki/Pines%27_demon
* condensed matter physics
* quant. mech. excited states
* collective excitation of e- in diff., out of phase energy bands
* collective excitations: magnon, phason, exciton

#physics #CondensedMatterPhysics #PinesDemon #plasmon

Physicists have discovered a new quantum phenomenon in a 3D metal: Pines’ Demon. It’s a type of plasmon that has no charge and was predicted in 1956. It could help us understand superconductivity and other exotic states of matter. #physics #quantum #pinesdemon
https://www.sciencealert.com/physicists-have-observed-a-demon-plasmon-in-strontium-ruthenate?utm_source=flipboard&utm_content=HariTulsidas%2Fmagazine%2FMind+and+Matter

> Since Pines' Demon is predicted to play an important role in a wide range of phenomena, such as #transitions in particular kinds of #semimetals and #superconductivity , the work has important implications for material #physics .

> Usually in science, a "demon" is a hypothetical opponent for scientists and philosophers to argue against in a thought experiment, but Pines' Demon is quite different.
It's actually a type of #plasmon – a discrete unit of waves among rippling through a population of electrons . Plasmons have been described as the #quantum analogue of an #acoustic sound in a classical gas.

#Physicists Have Observed a 'Demon' Plasmon in Strontium Ruthenate
https://www.sciencealert.com/physicists-have-observed-a-demon-plasmon-in-strontium-ruthenate

#PinesDemon