2012
DOI: 10.1063/1.4736558
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Noise and transport characterization of single molecular break junctions with individual molecule

Abstract: Abstract. 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 Ca, 87.15.hj, 85.65.+h.

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Cited by 31 publications
(40 citation statements)
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“…It is well-known that π-conjugated single molecules adsorbed onto noble metal electrodes such as fcc Au, Ag, Cu, or Pt, diffuse and form a two-dimensional ordered film at 300 K [20,[22][23][24][25]. Because the molecules move across the noble metal electrode surface, in break-junction measurements, the single molecule can "fit" between the two electrodes [32][33][34][35][36][37][38]. Noble metal surfaces, in which mainly s or p states are dominant near the Fermi energy (E F ), interact weakly with the molecule, essentially through the process of physisorption.…”
Section: Introductionmentioning
confidence: 99%
“…It is well-known that π-conjugated single molecules adsorbed onto noble metal electrodes such as fcc Au, Ag, Cu, or Pt, diffuse and form a two-dimensional ordered film at 300 K [20,[22][23][24][25]. Because the molecules move across the noble metal electrode surface, in break-junction measurements, the single molecule can "fit" between the two electrodes [32][33][34][35][36][37][38]. Noble metal surfaces, in which mainly s or p states are dominant near the Fermi energy (E F ), interact weakly with the molecule, essentially through the process of physisorption.…”
Section: Introductionmentioning
confidence: 99%
“…Both cases show a 1/ f -distribution at low frequencies. Reference [33] characterized the noise in the voltage across a gold-wire break-junction in vacuum at room temperature. Both in the presence and absence of a molecule in the junction, at high frequencies the power spectrum of the voltage is identical to the spectrum of thermal (Johnson-Nyquist) noise.…”
Section: Experimental Noisementioning
confidence: 99%
“…In partitioned approaches, the lead-molecule coupling and the bias are added to the Hamiltonian at t 0 simultaneously [58]. This is unlike the situation in real experiments, where the leads equilibrate with the molecule prior to the bias switch-on time t 0 [59], making a partition-free approach a necessity for an accurate description of the transient regime. In Ref.…”
Section: Introductionmentioning
confidence: 99%