Non-Fermi-liquid behavior consistent with a preasymptotic disorder-tuned ferromagnetic quantum critical point in the heavy fermion system CeTi1−xVxGe3

An investigation of the thermodynamic and electrical transport properties of the isoelectronic chemical substitution series <a:math xmlns:a="http://www.w3.org/1998/Math/MathML"><a:mrow><a:msub><a:mi>CeTi</a:mi><a:mrow><a:mn>1</a:mn><a:mo>−</a:mo><a:mi>x</a:mi></a:mrow></a:msub><a:msub><a:mi mathvariant="normal">V</a:mi><a:mi>x</a:mi></a:msub><a:msub><a:mi>Ge</a:mi><a:mn>3</a:mn></a:msub></a:mrow></a:math> (CTVG) single crystals is reported. As <c:math xmlns:c="http://www.w3.org/1998/Math/MathML"><c:mi>x</c:mi></c:math> increases, the ferromagnetic (FM) transition temperature is suppressed, reaching absolute zero at the critical concentration <d:math xmlns:d="http://www.w3.org/1998/Math/MathML"><d:mrow><d:mi>x</d:mi><d:mo>=</d:mo><d:mn>0.4</d:mn></d:mrow></d:math>, 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 suggests the presence of an FM quantum critical point (QCP) in CTVG. The obtained critical exponents indicate that CTVG falls in the preasymptotic region of the disorder-tuned FM QCP predicted by the Belitz-Kirkpatrick-Vojta theory.