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VOLUME 89 | ISSUE 1 | PAGE 26
Tuning of tunneling current noise spectra singularities by localized states charging
PACS: 05.40.-a, 71.10.-w, 73.40.Gk
Abstract
We report the results of theoretical investigations of tunneling current noise spectra in a wide range of applied bias voltage. Localized states of individual impurity atoms play an important role in tunneling current noise formation. It was found that switching "on" and "off" of Coulomb interaction of conduction electrons with two charged localized states results in power law singularity of low-frequency tunneling current noise spectrum (1/fα) and also results on high frequency component of tunneling current spectra (singular peaks appear).




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