The influence of Coulomb interaction of localized charges on low-temperature scanning tunnelling spectra of surface nanodefectsстатья
Статья опубликована в высокорейтинговом журнале
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Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Аннотация:In the present work we report experimental and theoretical results of investigations of the local electronic properties of highly oriented pyrolytic graphite (HOPG) over a wide temperature range by means of a scanning tunnelling microscope (STM)/scanning tunnelling spectroscope technique. We have examined artificial nanodefects produced by remote plasma treatment on a (0001) HOPG surface. We have found substantial differences between STM topographic images as well as between local spectroscopy data measured at room temperature and at He temperatures. We believe that this difference is caused by the strong decrease of the relaxation rate of non-equilibrium electrons in STM junctions at lower temperatures resulting in the appearance of localized charges in the contact area.