J. Phys. Colloques
Volume 42, Numéro C6, Décembre 1981International Conference on Phonon Physics
|Page(s)||C6-658 - C6-660|
J. Phys. Colloques 42 (1981) C6-658-C6-660
EFFECT OF MAGNETIC FIELD ON BALLISTIC HEAT-PULSE SCATTERING IN n-TYPE GERMANIUMT. Miyasato1, M. Tokumura2 et F. Akao2
1 Department of Physics, University of Lancaster, Lancaster LA1 4YB, England
2 The Institute of Scientific and Industrial Research, Osaka University, Suita 565 Osaka, Japan
The scattering of ballistic heat-pulse propagating along the (100) axis of lightly Sb or As doped Ge has been studied as a function of (100) magnetic field and the heater temperatures ranging from 4.6 to 8.6 X for Sb doped Ge (6.6 to 9.3 K for As doped Ge). It is shown that the transmitted ballistic heat-pulse intensity detected by CdS thin film bolometer increases with increasing magnetic field up to 60 kG with sample temperatures ranging from 1.8 to 4.2 K, and the behavior depends on the concentration of donor atom even at such a low concentration region. The behavior of the detected ballistic heat-pulse amplitude is compared with a calculation based on the Suzuki-Mikoshiba theory, taking into the shrinkage effect of the donor wave function and the resulting change of the value of the valley-orbit splitting.