Coulomb blockade related to an anti-localization effect in external environment in an array of single tunnel junctions/carbon nanotubes

Citation
J. Haruyama et al., Coulomb blockade related to an anti-localization effect in external environment in an array of single tunnel junctions/carbon nanotubes, JPN J A P 1, 40(3B), 2001, pp. 2033-2037
Citations number
25
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Volume
40
Issue
3B
Year of publication
2001
Pages
2033 - 2037
Database
ISI
SICI code
Abstract
We report on Coulomb blockade caused by a high-impedance external electroma gnetic environment (EME) related to a localization effect in a single tunne l junctions/Carbon nanotubes system. Observed Coulomb blockade, supported b y a linear temperature dependence of zero bias conductance, mathematically follows phase correlation theory, which explains the roles of EME and impli es that tunneling of electrons is suppressed by transferring the energy to its EME with a total impedance Z(t)(omega) higher than quantum resistance. Our high Z(t)(omega), however, is strongly associated with anti-localizatio n effect without any energy dissipation but actually contributes to Coulomb blockade, because its phase modulation by magnetic field modulates also Co ulomb blockade. Is the energy transfer to such high impedance EME actually indispensable for Coulomb blockade?.