Summary
The large correction factor by which Klemen’s formula must be multiplied in order to provide a reliable description of the thermal-resistivity contribution due to dislocations is explained in the frame of the same isotropic model used by Klemens, Ziman and Carruthers and is attributed to an incorrect way of treating anharmonicity and phonon averages in the theories of the mentioned authors.
Riassunto
Il rilevante fattore di correzione per cui è necessario moltiplicare la formula di Klemens, se si vuole descrivere il contributo sperimentale delle dislocazioni alla resistività termica, è qui spiegato nell’ambito del medesimo modello isotropo usato da Klemens, Ziman e Carruthers, ed è attribuito ad una trattazione non corretta dell’armonicità e delle medie sulle direzioni fononiche da parte dei suddetti autori.
Резюме
В рымках изотропной модели, которая была исполъзована Клеменсом, Зимахом и Карутерсом, объясняется болъшая величина поправочного множитела, на которой необходимо умножить формулу Клеменса, чтобы описать эксперимен-тальный вклад, обусловленный дислокациями, в термосопротивление. Отмечается некорректный способ рассмотрения ангармоничности и усредхений по фононам в теориях вышеуказанных авторов.
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Omini, M., Teppati, G. Dislocations in anharmonic crystals. Il Nuovo Cimento D 8, 597–614 (1986). https://doi.org/10.1007/BF02451085
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DOI: https://doi.org/10.1007/BF02451085