Non-Fermi-liquid behavior in a ferromagnetic heavy fermion system CeTi_1-xV_xGe_3
arxiv(2024)
摘要
An investigation of the thermodynamic and electrical transport properties of
the isoelectronic chemical substitution series CeTi_1-xV_xGe_3
(CTVG) single crystals is reported. As x increases, the ferromagnetic (FM)
transition temperature is suppressed, reaching absolute zero at the critical
concentration x = 0.4, where a non-Fermi-liquid low-temperature specific heat
and electrical resistivity, as well as the hyperscaling of specific heat and
magnetization are found. Our study clearly identifies an FM quantum critical
point (QCP) in CTVG. The obtained critical exponents suggest that CTVG falls in
the preasymptotic region of the disorder-tuned FM QCP predicted by the
Belitz-Kirkpatrick-Vojta theory.
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