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
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?.