A model to calculate the fundamental absorption edge in heavily doped semiconductors is proposed. The model is based on the assumption that the quasimomentum conservation rule in optical transitions is partially released in random media. This model is applied to transmission data of Ga1-xMnxAs epilayers. The values obtained for the free hole concentration p = 7 x 10(19) cm(-3), and the p-d exchange integral N(o)beta = - 1 eV reproduce reasonably well the fundamental absorption edge of Ga1-xMnxAs.
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Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Elect Mat Program, Berkeley, CA 94720 USAUniv Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Elect Mat Program, Berkeley, CA 94720 USA
Yu, KM
Walukiewicz, W
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机构:Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Elect Mat Program, Berkeley, CA 94720 USA
Walukiewicz, W
Wojtowicz, T
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机构:Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Elect Mat Program, Berkeley, CA 94720 USA
Wojtowicz, T
Lim, WL
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机构:Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Elect Mat Program, Berkeley, CA 94720 USA
Lim, WL
Liu, X
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机构:Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Elect Mat Program, Berkeley, CA 94720 USA
Liu, X
Bindley, U
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机构:Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Elect Mat Program, Berkeley, CA 94720 USA
Bindley, U
Dobrowolska, M
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机构:Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Elect Mat Program, Berkeley, CA 94720 USA
Dobrowolska, M
Furdyna, JK
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机构:Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Elect Mat Program, Berkeley, CA 94720 USA