High magnetic field induced crossover from the Kondo to Fermi liquid behavior in 1$T$-VTe$_{2}$ single crystals

TL;DR

This study reveals a magnetic field-induced crossover from Kondo to Fermi liquid behavior in 1T-VTe2 crystals, highlighting the interplay between magnetic field, Kondo effect, and electronic transport properties.

Contribution

It demonstrates the magnetic field-driven transition from Kondo to Fermi liquid behavior in 1T-VTe2 and models resistivity using the modified Hamann expression.

Findings

Resistivity shows a crossover from Kondo to Fermi liquid behavior under high magnetic fields.

Negative magnetoresistivity indicates Kondo features from intercalated V ions with S=1/2.

Resistivity peaks below T_K due to Kondo resonance splitting.

Abstract

The magnetic and magnetotransport properties of metallic 1$T$-VTe$_{2}$ single crystals were investigated at temperatures from 1.3 to 300 K and in magnetic fields up to 35 T. Upon applying a high magnetic field, it is found that the electrical resistivity displays a crossover from the logarithmic divergence of the single-impurity Kondo effect to the Fermi liquid behavior at low temperatures. The Brillouin scale of the negative magnetoresistivity above the Kondo temperature $T_{\rm{K}}$ = 12 K indicates that the Kondo features originate from intercalated V ions, with $S$ = 1/2. Both magnetic susceptibility and Hall effect show an anomaly around $T_{\rm{K}}$. By using the modified Hamann expression we successfully describe the temperature-dependent resistivity under various magnetic fields, which shows the characteristic peak below $T_{\rm{K}}$ due to the splitting of the Kondo resonance.