Crossover from Kondo to Fermi-liquid behavior induced by high magnetic field in 1T- VTe2 single crystals

Abstract

The magnetic and magnetotransport properties of metallic 1T-VTe2 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 TK = 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 TK. By using the modified Hamann expression we successfully describe the temperature-dependent resistivity under various magnetic fields, which shows the characteristic peak below TK due to the splitting of the Kondo resonance.