Disorder-enhanced dielectric response of nanoscale and mesoscopic insulators
Journal
Physical Review Letters
Journal Volume
97
Journal Issue
26
Date Issued
2006
Author(s)
Abstract
Enhancement of the dielectric response of insulators by disorder is theoretically proposed, where the quantum interference of electronic waves through the nanoscale or mesoscopic system and its change due to external perturbations control the polarization. In the disordered case with all the states being localized, the resonant tunneling, which is topologically protected, plays a crucial role, and enhances the dielectric response by a factor 30-40 compared with the pure case. The realization of this idea with accessible materials or structures is also discussed.
SDGs
Type
journal article