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Intervalley Scattering of Hot Electrons in Germanium at Millikelvin Temperatures

A. Broniatowski 1
CSNSM - Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse, CSNSM - Centre de Sciences Nucléaires et de Sciences de la Matière
Abstract : A method is presented to determine the field dependence of the intervalley scattering rate for hot electrons in germanium, based on an analysis of electron straggle in a detector crystal fitted with segmented electrodes. Measurements in high-purity and in lightly doped n- and p-type crystals at millikelvin temperatures demonstrate the dominant role of impurity scattering at low field (a few V/cm), whereas phonon scattering takes precedence at higher field intensities. An analysis of the experimental data by reference to past investigations of the acoustoelectric effect in germanium strongly suggests that the impurities involved are the dopant species in the neutral state.
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Submitted on : Monday, September 8, 2014 - 4:05:39 PM
Last modification on : Wednesday, September 16, 2020 - 5:42:48 PM




A. Broniatowski. Intervalley Scattering of Hot Electrons in Germanium at Millikelvin Temperatures. Journal of Low Temperature Physics, Springer Verlag (Germany), 2014, 176, pp.860-869. ⟨10.1007/s10909-014-1091-y⟩. ⟨in2p3-01061853⟩



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