Enhanced dielectric response by disordered nanoscale/mesoscopic insulators
Mesoscale and Nanoscale Physics
2015-06-25 v3 Materials Science
Abstract
Enhancement of the dielectric response of insulators by disorder is theoretically proposed, where the quantum interference of electronic waves through the nanoscale/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. Realization of this idea with accessible materials/structures is also discussed.
Cite
@article{arxiv.cond-mat/0605215,
title = {Enhanced dielectric response by disordered nanoscale/mesoscopic insulators},
author = {Shigeki Onoda and Chyh-Hong Chern and Shuichi Murakami and Yasushi Ogimoto and Naoto Nagaosa},
journal= {arXiv preprint arXiv:cond-mat/0605215},
year = {2015}
}
Comments
4 pages including 3 figures; minor revision; a high-resolution figure available at http://appi.t.u-tokyo.ac.jp/~sonoda/papers.html