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Motivated by experiments on doped transition metal oxides, this paperconsiders the interplay of interactions, disorder, kinetic energy andtemperature in a simple system. An ensemble of two-site Anderson-Hubbard modelsystems has already been shown to display a zero-bias anomaly which sharesfeatures with that found in the two-dimensional Anderson-Hubbard model. Herethe temperature dependence of the density of states of this ensemble isexamined. In the atomic limit, there is no zero-bias anomaly at zerotemperature, but one develops at small nonzero temperatures. With hopping,small temperatures augment the zero-temperature kinetic-energy-driven zero-biasanomaly, while at larger temperatures the anomaly is filled in.

Temperature dependence of the zero-bias anomaly in the Anderson-Hubbard model: Insights from an ensemble of two-site systems