Electron-Electron Interaction in Disordered Mesoscopic Systems: Weak Localization and Mesoscopic Fluctuations of Polarizability and Capacitance

摘要

The weak localization correction and the mesoscopic fluctuations of thepolarizability and the capacitance of a small disordered sample are studiedsystematically in 2D and 3D geometries. While the grand canonical ensemblecalculation gives the positive magnetopolarizability, in the canonical ensemble(appropriate for isolated samples) the sign of the effect is reversed. Themagnitude of mesoscopic fluctuations for a single sample exceeds considerablythe value of the weak localization correction.