TY  - JOUR
AU  - Sydoruk, V. A.
AU  - Xiang, D.
AU  - Vitusevich, S. A.
AU  - Petrychuk, M. V.
AU  - Vladyka, A.
AU  - Zhang, Y.
AU  - Offenhäusser, A.
AU  - Kochelap, V. A.
AU  - Belyaev, A. E.
AU  - Mayer, D.
TI  - Noise and transport characterization of single molecular break junctions with individual molecule
JO  - Journal of applied physics
VL  - 112
SN  - 0021-8979
CY  - Melville, NY
PB  - American Institute of Physics
M1  - PreJuSER-22539
SP  - 014908
PY  - 2012
N1  - Financial support from Helmholtz-CSC is gratefully acknowledged.
AB  - We studied the noise spectra of molecule-free and molecule-containing mechanically controllable break junctions. Both types of junctions revealed typical 1/f noise characteristics at different distances between the contacts with square dependence of current noise power spectral density on current. Additional Lorentzian-shape (1/f(2)) noise components were recorded only when nanoelectrodes were bridged by individual 1,4-benzenediamine molecule. The characteristic frequency of the revealed 1/f(2) noise related to a single bridging molecule correlates with the lock-in current amplitudes. The recorded behavior of Lorentzian-shape noise component as a function of current is interpreted as the manifestation of a dynamic reconfiguration of molecular coupling to the metal electrodes. We propose a phenomenological model that correlates the charge transport via a single molecule with the reconfiguration of its coupling to the metal electrodes. Experimentally obtained results are in good agreement with theoretical ones and indicate that coupling between the molecule metal electrodes is important aspect that should be taken into account. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4736558]
KW  - J (WoSType)
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000306513400157
DO  - DOI:10.1063/1.4736558
UR  - https://juser.fz-juelich.de/record/22539
ER  -