## Abstract

A calculation is made of the electrical conductivity tensor sigma // mu // nu ( omega ) of a semiconductor with a superlattice in an alternating electric field of frequency not exceeding the gap between the two nearest minibands. The Kubo formula is used for sigma // mu // nu ( omega ) and the projection operator method is employed to transform this formula so that it is convenient for investigating high-frequency properties of crystals with an anisotropic spectrum. An analysis of the expression sigma // mu // nu ( omega ) is made for various polarizations of an electromagnetic field allowing for the electron statistics. In the high-frequency limit ( H D-BAR omega APP GRTH T) the behavior of sigma // mu // nu ( omega ) differs from that predicted by the theory which ignores the frequency dependence of the relaxation time.

Original language | English |
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Pages (from-to) | 1149-1152 |

Number of pages | 4 |

Journal | Semiconductors |

Volume | 12 |

Issue number | 10 |

State | Published - 1 Jan 1978 |

## ASJC Scopus subject areas

- Engineering (all)