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1INTRODUCTIONInarealcrystalsystem,thelaticevibrationswilnotbetheeigenstatesofthesys-tem,i.e.,aninitialymonochromaticnonequili...
1INTRODUCTIONInarealcrystalsystem, thelaticevibrationswilnotbetheeigenstatesofthesys-tem, i. e. , Aninitialymonochromaticnonequili ...