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Spin-lattice relaxation andg-shift in insulators

Спин-решеточная релаксация иg-сдвиг в изоляторах

  • Published:
Il Nuovo Cimento B (1971-1996)

Summary

The spin-lattice relaxation of a Kramer's doublet arising from as-like ground state in any crystal symmetry is discussed. It is shown that in the cubic case the relaxation rate for one-phonon processes can be expressed in terms of the staticg value and its rate of change under dilatation. A general formalism and its application to the case ofF centres in alkali halides are given.

Riassunto

Si discute il rilassamento spin-reticolo di un doppietto di Kramer che nasce da uno stato fondamentale tipos in qualsiasi simmetria cristallina. Si mostra che nel caso cubico il tasso di rilassamento per processi ad un fonone può essere espresso in termini del valore statico dig e del suo tasso di cambiamento per dilatazione. Si dà un formalismo generale ed una sua applicazione nel caso dei centriF degli alogenuri alcalini.

Резюме

Обсуждается спин-решеточная релаксация дублета Крамера, вызваннаяs-подобным основным состояннем при любой симметрии кристалла. Показывается, что в кубическом случае интенсивность релаксации для однофононных процессов может быть выражена через статическую величинуg. Описывается общий формалием и его примененияF-центров в щелочногалоидных соединениях.

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Authors and Affiliations

  1. Departmento de Física e Ciencia dos Materiais, Instituto de Física e Química de São Carlos, Universidade de São Paulo, 13560, São Carlos, SP, Brazil

    M. C. Terrile & H. Panepucci

  2. Departmento de Física, Centro de Investigación del Instituto Politécnico Nacional, Apartado Postal 14-740, México 14, D. F., México

    J. S. Helman

Authors
  1. M. C. Terrile
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  2. H. Panepucci
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  3. J. S. Helman
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Terrile, M.C., Panepucci, H. & Helman, J.S. Spin-lattice relaxation andg-shift in insulators. Nuov Cim B 53, 446–454 (1979). https://doi.org/10.1007/BF02739907

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