This work stands apart: there is almost nothing nearby, with the nearest neighbor at a distance of 0.531. Surrounding studies focus on Cooper pairs, semiconductors, superfluidity, and thermal conductivity, but there is no direct link to Kondo lattices. The thematic group indicates cooper_pair, semiconductor, superfluidity, thermal_conductivity, yet this article addresses the physics of strongly correlated electrons and quantum phase transitions. It is the first attempt to transfer the Kondo lattice concept from f-electrons to d-electrons in a layered dichalcogenide.
The authors grew V5S8 single crystals by chemical vapor transport and measured heat capacity, magnetic susceptibility, and electrical resistance at pressures up to 10 GPa in a Bridgman cell. Pressure was calibrated against the superconducting transition of lead. The analysis included fitting the low-temperature heat capacity to the law Cp/T = γ + βT², the susceptibility to the Curie–Weiss law, and the resistance to the power law ρ = ρ₀ + ATⁿ.
At ambient pressure, V5S8 exhibits an antiferromagnetic transition at 32 K and Fermi-liquid behavior with a quadratic resistance dependence. The Sommerfeld coefficient γ ≈ 70 mJ/(mol·K²) and the coefficient A ≈ 6×10⁻² μΩ·cm/K² indicate an effective mass enhancement of 3–5 times compared to DFT calculations. The Kadowaki–Woods ratio RKW = 1.2×10⁻⁵ μΩ·cm·(mol·K/mJ)² falls into the intermediate mass renormalization range. Under pressure, the Néel temperature smoothly decreases up to 9 GPa and then drops sharply at 10 GPa; simultaneously, the exponent n in the resistance law decreases from 2 to 1, signaling the destruction of the Fermi liquid and a transition to a non-Fermi-liquid state.
Unlike neighboring works focused on superconductivity or thermophysics, this study is the first to demonstrate a quantum critical point in a d-electron Kondo lattice. This extends the applicability of the Doniach phase diagram to systems with narrow d-bands and shows that heavy quasiparticles can coexist with magnetic order. The result challenges the established view that f-electrons are necessary for quantum criticality.
The topic could develop toward studying the paramagnetic phase at pressures above 10 GPa: do heavy quasiparticles persist there, or does a non-Fermi-liquid phase emerge, driven by Kondo interactions? It is also possible to investigate other intercalated dichalcogenides with varying concentrations of magnetic ions to construct a complete phase diagram.
The results will impact the physics of strongly correlated systems, quantum magnetism, and materials science of layered compounds. Understanding the competition between RKKY and Kondo in d-electron systems may help in the search for new heavy-fermion materials.
Measure resistance and heat capacity at pressures above 10 GPa to determine the fate of heavy quasiparticles. Perform neutron diffraction under pressure to directly observe the suppression of magnetic order.
This work addresses a fundamental problem in condensed matter physics: the possibility of realizing quantum criticality and non-Fermi-liquid behavior in d-electron systems. It connects to the open question of the mechanisms behind heavy-fermion formation in transition metals and the role of magnetic frustration.
This section is addressed to the author of the paper and their colleagues. Neighbouring works were found by meaning-based search across our archive, not by word overlap. We do not review: we show the field around the work.
What the work does
The authors grew single crystals of V5S8 and measured heat capacity, susceptibility, and resistance under pressures up to 10 GPa. They observed suppression of antiferromagnetism and Fermi-liquid behavior at a critical pressure, pointing to a quantum critical point.
Where its strength is
This work demonstrates quantum criticality in a d-electron Kondo lattice for the first time, extending the Doniach phase diagram to systems with narrow d-bands and showing coexistence of heavy quasiparticles with magnetic order.
Where it could go next
Worth trying
Why this may matter
If quantum criticality in d-electron systems is confirmed, it could open up a new class of materials for studying non-Fermi-liquid behavior and possibly unconventional superconductivity without the need for rare-earth elements.
Nearby works in our archive
The archive is sparse around this work: the closest review is only 0.49, against a usual 0.64. It looks like few have drilled nearby.
V5S8 crystals can be grown as needles up to 1 mm long, which is enough to measure resistance along the c-axis using a four-point method.