Original scientific paper
On the effective mass in small-gap materials under magnetic quantization
Kamakhya Prasad Ghatak
; Department of Electronics and Telecommunication Engineering, Faculty of Engineering and Technology, University of Jadavpur, Calcutta-700 032, India
Bhaswati Mitra
; Office of the Controller of Examinations, University of Jadavpur, Calcutta-700 032, India
Shambhu Nath Biswas
; Department of Electronics and Telecommunication Engineering, Bengal Engineering College, Howrah 711 103, West Bengal, India
Abstract
An attempt is made to study the effective mass in small-gap materials under strong magnetic quantization taking Bi and p-CdSb as examples. It is found that for Bi the effective electron mass at the Fermi level depends on Fermi energy, and the magnetic quantum number due to the influence of band non-parabolicity, resulting in different effective masses corresponding to different magnetic sub-bands. The same mass increase with increasing electron concentration and oscillates of the orientation of the quantizing magnetic field, respectively. The effective hole mass in p-CdSb depends on the magnetic quantum number which in the characteristic feature of the Yamada model. Besides, the effective quantum number dependent Fermi level masses differ widely with each other for relatively small values of hole concentration and for all values of the quantizing magnetic field, respectively.
Keywords
Hrčak ID:
331733
URI
Publication date:
4.12.1989.
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