Intervalley Scattering of Hot Electrons in Germanium at Millikelvin Temperatures

被引：7

作者：

Broniatowski, A. ^{[1
,2
]}

机构：

[1] CNRS, IN2P3, Ctr Spectrometrie Nucl & Spectrometrie Masse, F-91405 Orsay, France

[2] Univ Paris 11, F-91405 Orsay, France

来源：

JOURNAL OF LOW TEMPERATURE PHYSICS | 2014年 / 176卷 / 5-6期

关键词：

Germanium cryogenic detector; Hot electron transport; Dark matter; N-TYPE GERMANIUM; SEMICONDUCTORS; ANISOTROPY; DETECTORS; RECOMBINATION; TRANSPORT; CENTERS; GE;

D O I：

10.1007/s10909-014-1091-y

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

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.

引用

页码：860 / 869

页数：10

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