Coulomb blockade related to a localization effect in a single tunnel-junction/carbon-nanotube system - art. no. 073406

We report on Coulomb blockade caused by the high impedance external electro magnetic environment (EME) related to a localization effect in a single tun nel-junction/carbon-nanotube 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 the antilocaliza tion effect without any energy dissipation hut actually contributes to Coul omb blockade, because its phase modulation by magnetic field modulates also Coulomb blockade. Is the energy transfer to such high impedance EME actual ly indispensable for Coulomb blockade?.