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Pines' demon plasmon in Sr2RuO4

Discovering a demon

August 9, 2023

 

This manuscript presents the discovery of a quasiparticle called “demon” (from “distinct electron motion” or d.e.m.) that was predicted 66 years ago by David Pines and not observed definitively until now. The characteristic excitation of a metal is a plasmon, which is a quantized excitation of its electron density, and is...

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