Precursor of non-Fermi liquid behaviour in the one-dimensional periodic Anderson model with disorder

We have studied the one-dimensional periodic, symmetric Anderson model at h alf filling in the presence of disorder using finite-temperature quantum Mo nte Carlo techniques. We have examined for the first time the disorder both in hybridization between the local f-orbitals and the conduction electrons and in the local f-site energy, using a uniform distribution of width a. T he f-orbital local magnetic moment, the uniform magnetic susceptibility, th e charge compressibility, and the nearest-neighbour magnetic correlation fu nction have been calculated as a function of the disorder distribution widt h a. We find that the disorder in hybridization has a dramatic effect on th e low-temperature magnetic properties exhibiting a non-Fermi-liquid behavio ur, and that for the range of temperature studied the magnetic susceptibili ty can be scaled by a power law with an exponent that is in agreement with recent experiments. On the other hand, disorder in the local f-orbital ener gy level does not show a non-Fermi liquid behaviour.