Topic
Conductance
About: Conductance is a research topic. Over the lifetime, 8088 publications have been published within this topic receiving 235961 citations.
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TL;DR: Visible and infrared light emitted at a Ag-Ag(111) junction has been investigated from tunneling to single-atom contact conditions with a scanning tunneling microscope in terms of current noise at optical frequencies, which is characteristic of partially open transport channels.
Abstract: Visible and infrared light emitted at a Ag-Ag(111) junction has been investigated from tunneling to single-atom contact conditions with a scanning tunneling microscope. The light intensity varies in a highly nonlinear fashion with the conductance of the junction and exhibits a minimum at conductances close to the conductance quantum. The data are interpreted in terms of current noise at optical frequencies, which is characteristic of partially open transport channels.
88 citations
TL;DR: In this paper, both the classical and the improved slope-intercept techniques have been applied to streaming potential data measured with slit glass channels, ranging in height from 3 µm to 66 µm, for several aqueous electrolyte solutions.
88 citations
TL;DR: In this article, the authors investigated the temperature dependence of both the conductance and its fluctuations and found qualitative differences between the investigated molecules, suggesting that the variations of conductance due to the latter effect can be reduced by an appropriate design of the molecule.
Abstract: consistent with an effective -orbital coupling model. Tilting the phenyl rings from a planar conformation to one with perpendicular rings decreases the conductance by roughly 2 orders of magnitude. These findings are in agreement with experiments. We further study the temperature dependence of both the conductance and its fluctuations and find qualitative differences between the investigated molecules. The temperature dependence arises from thermal smearing in the leads and also from a thermal average over different contact configurations. Our results suggest that the variations of the conductance due to the latter effect can be reduced by an appropriate design of the molecule. DOI: 10.1103/PhysRevB.77.155312
87 citations
87 citations
TL;DR: The experimental variation in conductance that can be expected through dynamically evolving Au-molecule-Au junctions is approximated using molecular dynamics to model thermal fluctuations and a nonequilibrium Green's function code (Hückel-IV 2.0) to calculate the charge transport.
Abstract: The experimental variation in conductance that can be expected through dynamically evolving Au-molecule-Au junctions is approximated using molecular dynamics to model thermal fluctuations and a nonequilibrium Green's function code (Huckel-IV 2.0) to calculate the charge transport. This generates a statistical set of conductance data that can be used to compare directly with experimental results. Experimental measurements on Au-single molecule junctions show a large variation in conductance values between different identically prepared junctions. Our computational results indicate that the Au-Au and the Au-molecule fluctuations provide extensive geometric freedom and an associated broad distribution in calculated conductance values. Our results show agreement with experimental measurements of the low bias voltage conductance and conductance distribution for both thiol-Au and amine-Au linker structures. -
87 citations