Heavy-Fermion Material

In materials science, heavy fermion materials are a specific type of intermetallic compound, containing elements with 4f or 5f electrons in unfilled electron bands.

Version

v1 · 2026-09-28 · History

Domain-specific #

9824

Domain group

Natural Sciences

Origin domain

Physics

Subdomains

Condensed Matter Physics, Strongly Correlated Electrons → Physics

Core Idea

Heavy-Fermion Material is treated here as the recurring natural science, engineering, and health identity summarized by this source-grounded definition: In materials science, heavy fermion materials are a specific type of intermetallic compound, containing elements with 4f or 5f electrons in unfilled electron bands. In materials science, heavy fermion materials are a specific type of intermetallic compound, containing elements with 4f or 5f electrons in unfilled electron bands. Electrons are one type of fermion, and when they are found in such materials, they are sometimes referred to as heavy electrons.

Scope of Application

• Quantum criticality. The proximity to a quantum critical point determines many of the properties of these systems and allows a scaling description .

• Historical overview. Ott in 1975, who observed enormous magnitudes of the linear specific heat capacity in CeAl 3 .

• Historical overview. In 1994, the discovery of a quantum critical point and non-Fermi liquid behavior in the phase diagram of heavy fermion compounds by H. von Löhneysen et al. led to a new.

• Historical overview. Another experimental breakthrough was the demonstration in 1998 (by the group of Gil Lonzarich) that quantum criticality in heavy fermions can be the reason for unconventional superconductivity.

• Historical overview. Heavy fermion materials play an important role in current scientific research, acting as prototypical materials for unconventional superconductivity, non-Fermi liquid behavior and quantum criticality.

Clarity

A clear use of Heavy-Fermion Material names the carrier, the operative relation, and the conditions under which the source treats the identity as present. The minimal definition is In materials science, heavy fermion materials are a specific type of intermetallic compound, containing elements with 4f or 5f electrons in unfilled electron bands.

Manages Complexity

Heavy-Fermion Material compresses multiple natural science, engineering, and health details into a stable diagnostic relation. The source shows both the central mechanism—in 1994, the discovery of a quantum critical point and non-Fermi liquid behavior in the phase diagram of heavy fermion compounds by H. von Löhneysen et al. led to a new rise of interest in the research of these compounds.—and the practical consequence—above the characteristic coherence.

Abstract Reasoning

1. Type the carrier. Identify the natural science, engineering, and health entities to which the claim applies.
2. State the relation. Use the source-grounded identity: In materials science, heavy fermion materials are a specific type of intermetallic compound, containing elements with 4f or 5f electrons in unfilled electron bands.
3. Check operation and conditions. In this theory, the electrons are described by quasiparticles, which have the same quantum numbers and charge, but the interaction of the electrons is taken into account by introducing an effective mass, which differs.

Knowledge Transfer

Within the home domain. Knowledge about Heavy-Fermion Material transfers literally when a new case preserves the same carrier type, relation, and recognition test. The proximity to a quantum critical point determines many of the properties of these systems and allows a scaling description . Ott in 1975, who observed enormous magnitudes of the linear specific heat capacity in CeAl 3 . Beyond the home domain. No canonical parent is asserted for Heavy-Fermion Material.

Neighborhood in Abstraction Space

Heavy-Fermion Material sits in a moderately populated region (46^th percentile for distinctiveness): it has near-neighbors but no dense thicket of look-alikes.

Family — Condensed Matter & Physical Chemistry Models (26 abstractions)

Nearest neighbors

• Homes's law — 0.89
• Crystal momentum — 0.88
• Einstein solid — 0.86
• Su–Schrieffer–Heeger model — 0.86
• Hubbard model — 0.86

Computed from structural-signature embeddings · 2026-10-08