|
| |
FIZIKA A 4 (1995) 1, 33-44
 
INFLUENCE OF CROSSED ELECTRIC AND QUANTIZING MAGNETIC FIELDS ON THE
EFFECTIVE ELECTRON MASS IN SEMICONDUCTOR SUPERLATTICES
KAMAKHYA P. GHATAK and SHAMBHU N. BANIK*
Department of Electronic Science, University of Calcutta, University College of
Science and Technology, 92, Acharya Prafulla Chandra Road, Calcutta 700009, India
*Department of Physics, Dandirhat Nagendra Kumar Uchcha Siksha
Niketan,
P. O. Dandirhat, Dt. North 24 Parganas, West Bengal, India
Received 9 August 1994
Revised manuscript received 24 March 1995
An attempt is made to study the effective electron mass at the Fermi level in
semiconductor superlattices under cross-field configuration and to compare it with that of
the constituent materials, taking GaAs/AlAs superlattice as an example. It is found that
the effective electron masses along both directions depend also on the magnetic quantum
number. The characteristic feature of the cross-field is to introduce index-dependent
oscillatory mass anisotropy in the constituent materials. The numerical values of the mass
in superlattices are greater than of the forming compounds. The corresponding well-known
results in the absence of electric field have also been obtained from our generalized
analysis under certain limiting conditions.
UDC 538.915
PACS 71.25.Jd
|
