Temperature dependence of the zero-bias anomaly in the Anderson-Hubbard model: Insights from an ensemble of two-site systems
arXiv:1008.2245 · doi:10.1088/0953-8984/23/9/094213
Abstract
Motivated by experiments on doped transition metal oxides, this paper considers the interplay of interactions, disorder, kinetic energy and temperature in a simple system. An ensemble of two-site Anderson-Hubbard model systems has already been shown to display a zero-bias anomaly which shares features with that found in the two-dimensional Anderson-Hubbard model. Here the temperature dependence of the density of states of this ensemble is examined. In the atomic limit, there is no zero-bias anomaly at zero temperature, but one develops at small nonzero temperatures. With hopping, small temperatures augment the zero-temperature kinetic-energy-driven zero-bias anomaly, while at larger temperatures the anomaly is filled in.
8 pages, 3 figures; submitted to SCES 2010 conference proceedings
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Cited by in corpus (4)
- Effect of nonlocal interactions on the disorder-induced zero-bias anomaly in the Anderson-Hubbard model
- Understanding disorder-induced zero-bias anomalies in systems with short-range interactions: An atomic-limit perspective
- Strongly correlated zero-bias anomaly in double quantum dot measurements
- Persistence of energy-dependent localization in the Anderson-Hubbard model with increasing system size and doping