  Here we present our experimental and theoretical study of the effects of
pressure on the transport properties of the heavy-fermion alloy
Ce(1-x)Yb(x)CoIn5 with x~0.07. We specifically choose this value of ytterbium
concentration because the magnetic-field-induced quantum critical point, which
separates the antiferromagnetic and paramagnetic states at zero temperature,
approaches zero, as has been established in previous studies. Our measurements
show that pressure further suppresses quantum fluctuations in this alloy, just
as it does in the parent compound CeCoIn5. In contrast, the square-root
temperature dependent part of resistivity remains insensitive to pressure,
indicating that the heavy-quasiparticles are not involved in the scattering
processes leading to such a temperature dependent resistivity. We demonstrate
that the growth of the coherence temperature with pressure, as well as the
decrease of the residual resistivity, can be accurately described by employing
the coherent potential approximation for a disordered Kondo lattice.
