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arxiv: cond-mat/0409392 · v1 · submitted 2004-09-15 · ❄️ cond-mat.mes-hall

Band structure of semimagnetic Hg1-yMnyTe quantum wells

E. G. Novik , A. Pfeuffer-Jeschke , T. Jungwirth , V. Latussek , C. R. Becker , G. Landwehr , H. Buhmann , L. W. Molenkamp This is my paper
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keywords bandstructureapproachcalculatedexchangeinfluenceinteractionmodel
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The band structure of semimagnetic Hg_1-yMn_yTe/Hg_1-xCd_xTe type-III quantum wells has been calculated using eight-band kp model in an envelope function approach. Details of the band structure calculations are given for the Mn free case (y=0). A mean field approach is used to take the influence of the sp-d exchange interaction on the band structure of QW's with low Mn concentrations into account. The calculated Landau level fan diagram and the density of states of a Hg_0.98Mn_0.02Te/Hg_0.3Cd_0.7Te QW are in good agreement with recent experimental transport observations. The model can be used to interpret the mutual influence of the two-dimensional confinement and the sp-d exchange interaction on the transport properties of Hg_1-yMn_yTe/Hg_1-xCd_xTe QW's.

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