Many-body effects on the capacitance of multilayers made from strongly correlated materials

Details Many-body effects on the capacitance of multilayers made from strongly correlated materials Many-body effects on the capacitance of multilayers made from strongly correlated materials

2012-02-08

arxiv.org/abs/1202.1844v1

Physics

Condensed Matter

Strongly Correlated Electrons

19 pages, 7 figures, REVTex

Scientific paper

Recent work by Kopp and Mannhart on novel electronic systems formed at oxide interfaces has shown interesting effects on the capacitances of these devices. We employ inhomogeneous dynamical mean-field theory to calculate the capacitance of multilayered nanostructures. These multilayered nanostructures are composed of semi-infinite metallic leads coupled via a strongly correlated dielectric barrier region. The barrier region can be adjusted from a metallic regime to a Mott insulator through adjusting the interaction strength. We examine the effects of varying the barrier width, temperature, potential difference, screening length, and chemical potential. We find that the interaction strength has a relatively strong effect on the capacitance, while the potential and temperature show weaker dependence.

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