Aluminum break-point contacts
نویسندگان
چکیده
منابع مشابه
What are Landauer’s conduction channels in an atomic-size metallic contact?
Using microfabricated break junctions, we have produced Al and Au contacts consisting of a small number of atoms. These metallic quantum point contacts accomodate a small number of conduction channels. We have determined the individual transmission coefficients in contacts containing up to six conduction channels. The determination is based on a comparison of the highly nonlinear current–voltag...
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The analysis of the 27Al and 35Cl quadrupole coupling parameters of aluminum methyl chloride dimers were carried out on the basis of the density functional theory (DFT). The available experimental values of quarupole coupling constants were compared with their calculated ones. In this investigation, the correlations were made between calculated 27Al and 35Cl nuclear quadrupole coupling constant...
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We report a point-contact spectroscopy investigation of aluminium atomic-size contacts produced with the help of the mechanically controllable break-junction technique at low temperature. The derivatives of the differential conductance traces (d I/dV 2 versus V ) display point-symmetric structures at certain voltage values, which move upon stretching the contact. These excitations may give rise...
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We have measured the supercurrent in aluminum atomic point contacts containing a small number of well characterized conduction channels. For most contacts, the measured supercurrent is adequately described by the opposite contributions of two thermally populated Andreev bound states per conduction channel. However, for contacts containing an almost perfectly transmitted channel 0.9</=tau</=1 th...
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We have determined the individual transmission coefficients of Al quantum point contacts containing up to six conduction channels. The determination is based on a comparison of the highly nonlinear current-voltage characteristics in the superconducting state with the predictions of the theory for a single channel superconducting contact. We find that at least two channels contribute to the tran...
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