e/Heavy fermion

Information
has gloss	eng: In solid-state physics, heavy fermion materials are a specific type of metallic compounds that have a low-temperature specific heat whose linear term is up to 1000 times larger than the value expected from the free-electron theory. The heavy fermion behaviour has been found in rare earth and actinide metal compounds at very low temperatures (<10 K) in a broad variety of states including metallic, superconducting, insulating and magnetic states.
lexicalization	eng: heavy fermion
instance of	(noun) any particle that obeys Fermi-Dirac statistics and is subject to the Pauli exclusion principle fermion

Meaning
Japanese
has gloss	jpn: 重い電子系（おもいでんしけい、）は、ランタノイドやアクチノイドの化合物において、金属的的な電気伝導を示すにもかかわらず、電気伝導を担う電子の有効質量が、自由電子の質量の数百倍～千倍も「重く」なっていると考えられる一連の物質群のことである。
lexicalization	jpn: 重い電子系