heavy-fermion system

heavy-fermion system

[‚hev·ē ′fər·mē‚än ‚sis·təm]
(solid-state physics)
A lanthanide-based or actinide-based intermetallic compound in which the low-energy excitations (quasiparticles) of the conduction electron system have effective masses at low temperatures that are several hundred times the free-electron mass.
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