Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
1999-04-17
Physics
Condensed Matter
Strongly Correlated Electrons
13 pages, 3 figures
Scientific paper
We have studied the one-dimensional periodic, symmetric Anderson model at half filling in the presence of disorder using finite-temperature quantum Monte 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 $\Delta$. The $f$-orbital local magnetic moment, the uniform magnetic susceptibility, the charge compressibility, and the nearest-neighbor magnetic correlation function have been calculated as a function of the disorder distribution width $\Delta$. We find that the disorder in hybridization has a dramatic effect on the low-temperature magnetic properties exhibiting a non-Fermi-liquid behaviour, and that for the range of temperature studied the magnetic susceptibility 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 energy level does not show a non-Fermi liquid behaviour.
Chen Fangpei
Kioussis Nicholas
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