The importance of geometry, field, and temperature in tunneling and rectification behavior of point contact junctions of identical metals
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19.Note, however, that work function variations of the base surface of 0.5 eV over distances larger than the tip radius (500–1000 Å) are required in order to obtain the postulated asymmetry of an average or standard MOM junction. Such work function variations are quite unrealistic, so that “accidental” asymmetry of the required magnitude is rather improbable.
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28.Such values of temperature have been obtained from detailed calculations of the laser induced thermal effects on the tip structure (see Ref. 21).
29.To include the effects of the image and multiple image interactions, we have used a Green’s function formalism to obtain the exact potential in the presence of a tunneling charge between the electrodes for two important geometrical configurations: (1) the hyperboloidal tip‐planar base geometry and (2) the diode configuration consisting of two spheres. The latter is important because of experiments currently in progress at NBS using a diode with closed space (∼15–50 Å) gold spherical electrodes. See, for example, C. Teague, Bull. Am. Phys. Soc. 23, (1978).
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