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2002•physica status solidi (b)Requires access

Electron Effective Mass and Resonant Polaron Effect in CdTe/CdMgTe Quantum Wells

G. Karczewski, T. Wójtowicz, Yongjie Wang, Xiaoguang Wu, F. M. Peeters

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Abstract

Cyclotron resonance in CdTe/CdMgTe quantum wells (QWs) was studied. Due to the polaron effect the zero-field effective mass is strongly influenced by the QW width. The experimental data have been described theoretically by taking into account electron–phonon coupling and the non-parabolicity of the conduction band. The subband structure was calculated self-consistently. The best fit was obtained for an electron–phonon coupling constant α = 0.3 and bare electron mass of mb = 0.092m0.

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Cyclotron resonance in CdTe/CdMgTe quantum wells (QWs) was studied. Due to the polaron effect the zero-field effective mass is strongly influenced by the QW width. The experimental data have been described theoretically by taking into account electron–phonon coupling and the non-parabolicity of the conduction band. The subband structure was calculated self-consistently. The best fit was obtained for an electron–phonon coupling constant α = 0.3 and bare electron mass of mb = 0.092m0.

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Available abstract

Cyclotron resonance in CdTe/CdMgTe quantum wells (QWs) was studied. Due to the polaron effect the zero-field effective mass is strongly influenced by the QW width. The experimental data have been described theoretically by taking into account electron–phonon coupling and the non-parabolicity of the conduction band. The subband structure was calculated self-consistently. The best fit was obtained for an electron–phonon coupling constant α = 0.3 and bare electron mass of mb = 0.092m0.

Key concepts: Polaron, Quantum well, Effective mass (spring–mass system), Condensed matter physics, Cyclotron resonance, Electron, Physics, Coupling constant

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