Strongly correlated zero-bias anomaly in double quantum dot measurements

Experiments in doped transition metal oxides often show suppression the single-particle density of states at Fermi level, but disorder-induced zero-bias anomalies strongly correlated systems remain poorly understood. Numerical studies Anderson-Hubbard model have identified a anomaly that is unique to materials, with width proportional intersite hopping amplitude t [S. Chiesa, P. B. Chakraborty, W. E. Pickett, and R. T. Scalettar, Phys. Rev. Lett. 101, 086401 (2008)]. In ensembles two-site systems, same parameter dependence also occurs, suggesting similar physical origin [R. Wortis A. Atkinson, B 82, 073107 (2010)]. We describe how this kinetic-energy-driven may be seen mesoscopic realization based on double quantum dots. Moreover, double-quantum-dot measurements provide access not only ensemble-average details transitions which give rise anomaly.