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Conductance of Ag atoms and clusters on Ag(111): Spectroscopic and time‐resolved data
Author(s) -
Sperl A.,
Kröger J.,
Berndt R.
Publication year - 2010
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.200945485
Subject(s) - conductance , atom (system on chip) , scanning tunneling microscope , dimer , quantum tunnelling , spectroscopy , diffusion , molecular physics , materials science , atomic physics , chemistry , condensed matter physics , nanotechnology , physics , optoelectronics , organic chemistry , quantum mechanics , computer science , thermodynamics , embedded system
The evolution of the electronic structure of linear atomic Ag chains on Ag(111) has been explored atom by atom using low‐temperature scanning tunnelling microscopy and spectroscopy. Electronic states confined to the linear chains are well described within a particle‐in‐a‐box model. The evolution of an unoccupied Ag monomer resonance during the synthesis of an Ag dimer reveals that the Ag–Ag interaction is predominantly direct owing to the large spatial extension of p wave functions of the adsorbed atoms. The hopping dynamics of a single Ag atom adsorbed on Ag(111) have been monitored by time‐resolved two‐level conductance fluctuations of the tunnel junctions. Effective temperatures of the junction and diffusion barrier heights in the presence of the tip were extracted from a voltage‐dependent analysis of the fluctuation rate.