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Field Dependence of Electron Velocity in High-Purity Germanium at Cryogenic Temperatures

V. Aubry Fortuna 1 A. Broniatowski 2 P. Dollfus 1
1 IEF - Institut d'électronique fondamentale
2 CSNSM PS1
CSNSM - Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse, CSNSM - Centre de Sciences Nucléaires et de Sciences de la Matière
Abstract : The electron velocity in high‐purity germanium at 20 mK has been measured as a function of the electric field in the <100> orientation. A new simulation code, taking into account the key phenomena of ionized impurity and inelastic phonon scattering, has been developed for Monte Carlo modeling of electronic transport in Ge at cryogenic temperatures. The code accounts for the essential features of electron transport, including the hitherto unexplained effect of a negative differential mobility along the <111> field orientation. Experimental data for the electron velocities at 20 mK are reproduced with a satisfactory accuracy.
Keywords : bolometers cryogenics dark matter
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Conference papers
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http://hal.in2p3.fr/in2p3-00695301
Contributor : Christine Hadrossek <>
Submitted on : Monday, May 7, 2012 - 5:23:00 PM
Last modification on : Wednesday, September 16, 2020 - 5:43:30 PM

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V. Aubry Fortuna, A. Broniatowski, P. Dollfus. Field Dependence of Electron Velocity in High-Purity Germanium at Cryogenic Temperatures. THE THIRTEENTH INTERNATIONAL WORKSHOP ON LOW TEMPERATURE DETECTORS--LTD13, Jul 2009, Stanford, United States. pp.639-642, ⟨10.1063/1.3292422⟩. ⟨in2p3-00695301⟩

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