| Thème(s) : |
 |
|
|
| Titre : |
|
Transport Anisotropy and Impurity Scattering in Ge at Millikelvin Temperatures: Experimental Study |
|
| Auteur : |
|
E. Olivieri1, J. Domange1, 2, L. Dumoulin1, S. Marnieros1, A. Broniatowski1 |
|
| Laboratoire : |
|
|
|
| équipe(s) de recherche : |
|
CSNSM PS1 |
| Résumé : |
|
Anisotropy effects in hot carrier transport have been investigated in germanium crystals at mK temperatures in the electric field range pertaining to the operation of the Edelweiss dark matter detectors. Comparative measurements have been made on n-type specimens of different impurity contents, both ultra-pure (Nd-Na < 1010 cm-3) and doped to 1011 cm-3. At relatively high field intensities (> 5 V/cm), similar features of electron and hole transport are observed independent of the concentration of electrically active impurities. Differences appear at lower field (down to a fraction of a V/cm) with regard to electron straggling especially, dependent on crystal purity. These experiments demonstrate the importance on carrier transport of impurity scattering at low field, whereas phonon scattering becomes the dominant factor at higher field intensities. |
|
|
| Type de publication : |
|
Communications avec actes |
|
Date de publication
ou d'écriture : |
|
2012 |
|
| Date de la présentation : |
|
2011 |
|
Nom du périodique
Titre de l'ouvrage : |
|
Journal of Low Temperature Physics |
|
| Audience : |
|
internationale |
|
| Volume : |
|
167 |
|
| Page/Article : |
|
1137-1142 |
|
|
| Nom du colloque : |
|
14th International Workshop on Low Temperature Detectors |
|
| Ville du colloque : |
|
Heidelberg |
|
| Pays du colloque : |
|
Allemagne |
|
| Date du colloque (début) : |
|
01/08/2011 |
|
| Date du colloque (fin) : |
|
05/08/2011 |
|
| Speaker : |
|
A. Broniatowski |
|
|
| Identifiant local : |
|
CSNSM PS1 |
|
| Classification PACS : |
|
72.20.Ht, 29.40.Wk, 95.35.+d, 07.20.Mc |
|
| Mot(s)-clé(s) : |
|
Dark matter – cryogenic germanium detector – carrier anisotropy |
|
Récupérer au format
