Evaluation of conduction eigenchannels of an adatom probed by an STM tip

Martyna Polok, Dmitry V. Fedorov, Alexei Bagrets, Peter Zahn, and Ingrid Mertig
Phys. Rev. B 83, 245426 – Published 27 June 2011

Abstract

Ballistic conductance through a single atom adsorbed on a metallic surface and probed by a scanning tunneling microscope (STM) tip can be decomposed into eigenchannel contributions, which can be potentially obtained from shot noise measurements. Our density functional theory calculations provide evidence that transmission probabilities of these eigenchannels encode information on the modifications of the adatom's local density of states caused by its interaction with the STM tip. In the case of open shell atoms, this can be revealed in nonmonotonic behavior of the eigenchannel’s transmissions as a function of the tip-adatom separation.

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  • Received 7 May 2011

DOI:https://doi.org/10.1103/PhysRevB.83.245426

©2011 American Physical Society

Authors & Affiliations

Martyna Polok1,*, Dmitry V. Fedorov1, Alexei Bagrets2, Peter Zahn1, and Ingrid Mertig1,3

  • 1Institut für Physik, Martin-Luther-Universität Halle-Wittenberg, D-06099 Halle, Germany
  • 2Steinbuch Centre for Computing and Institute of Nanotechnology, Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
  • 3Max-Planck-Institut für Mikrostrukturphysik, Weinberg 2, D-06120 Halle, Germany

  • *martyna.polok@physik.uni-halle.de

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Vol. 83, Iss. 24 — 15 June 2011

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