''N collaboration with W. Kohn, the author has ~ - recently' treated the problem of cyclotron resonance for degenerate bands in semiconductors such as Ge and Si. In particular, it was predicted that for such bands there would be characteristic quantum deviations from the usual classical result at sufFiciently low tempera-tures.

Conductivity of semiconductors: mobility: Cyclotron resonance is used to obtain information on effective masses. Hall coefficient: Hall measurements are used to determine carrier concentration and mobility. In high electric field, the carriers acquire significant energy and become "hot".

The most general form of the Hamiltonian of an electron or hole in a semiconductor such as Si or Ge, in the presence of an external homogeneous magnetic field, is given. Two methods of obtaining the corresponding energy levels are discussed. The first should yield very accurate values for the magnetic field in the (111) direction for either Si ...

FoR electrons of a semiconductor situated in a magnetic field, there are two types of resonances connected with the cyclotron frequency WH. These are cyclotron resonance, when the frequency w of the high-frequency electric field coincides with WH, and the magnetophonon resonance of Gurevich and Firsov [t,2J, when the frequency w0 of the op­

Theory of Cyclotron Resonance. One of the most straightforward methods of measuring effective mass in a semiconductor is to study the behavior of the carriers in the presence of a magnetic field. The theory of this behavior may be developed …

Lecture 18 - Semiconductors - continued 5 Physics 460 F 2006 Lect 18 25 Cyclotron Resonance • Experimental way to measure effective masses • Magnetic field B defines particular direct in space • Electron rotate in plane perpendicular to B with a period of revolution ω c = qB/m* • Observed experimentally by the absorption of electromagnetic

Cyclotron resonance is one of the most direct and ac-curate tool to measure the e ective mass components in semiconductors. The basic idea of cyclotron resonance measurement is that electrons (or holes) undergoes cir-cular motion under the in …

This paper will discuss the experimental techniques used in the obser- vation of cyclotron resonance in semiconductors, the experimental problems involved, and the results which have been obtained. These experiments are the only ones which give a direct measure of the effective mass m* of charge carriers in a solid.

1989年5月1日 · The electron scattering behaviour in semiconductors is explored at the quantum limit for Ge, GaAs and InSb, making use of the FIR cyclotron resonance. The inverse relaxation time, or the scattering rate, has been obtained for acoustical deformation potential phonon scattering in Ge, neutral impurity scattering in GaAs, ionized impurity ...

Cyclotron resonance is a powerful tool to determine the effective mass of carriers, and to study energy band structure, electronic states, electron interactions with other elementary excitations, and electron–electron excitations. Cyclotron resonance in semiconductors was first observed by Dresselhaus et al. (1953) and Lax et al. (1954) for ...