870 resultados para Philologie slave
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1891 (T5).
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1893 (T7).
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Etat de collection : 1889-1896
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1895 (T9).
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1894 (T8).
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1889 (T3).
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1892 (T6).
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1905 (T3)-1907.
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1903 (T2)-1904.
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1908 (T4)-1910.
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1901 (T1)-1902.
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Périodicité : Biennal (1901/1902-1903/1904) ; triennal (1905/1907-1908/1910)
Resumo:
The optical conductivity of the Anderson impurity mode l has been calculated by emp l oying the slave boson technique and an expansion in powers of l i N, where N is the d egeneracy o f the f electron level . This method has been used to find the effective mass of the conduction electrons for temperatures above and below the Kondo tempera ture. For low temperatures, the mass enhancement is f ound to be large while a t high t emperatures, the mass enhancement is sma ll. The conductivity i s f ound to be Drude like with frequency dependent effective mass and scattering time for low independent effective mass and temperatures and scattering time f requency for high t emperatures. The behavior of both the effective mass and the conductivity is in qualitative agreement with experimental r esul t s .