Two-phonon electron scattering processes in metal point contacts
I. K. YansonPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR, Khar’kovYu. G. NaĭdyukPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR, Khar’kovO. I. ShkyarevskiiPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR, Khar’kov
ABI
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Features observed at double phonon energies are investigated in detail in the point contact spectra of a number of metals. It is shown that they are related to sequential electron scattering by two phonons in the contact domain. A comparison of the experimental data with results of a theoretical model proposed earlier showed good qualitative and satisfactory quantitative agreement for metals possessing a simple phonon spectrum. With respect to the intensities of one and two-phonon processes, this permits determination of the presence and degree of homogeneity of an impurity distribution in the point contact domain.
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