. "Disorder-induced broadening of transverse acoustic phonons in SixGe1-x mixed crystals" . "1"^^ . . "Inelastic neutron-scattering measurements of the dispersion and width of transverse acoustic branches are reported for SixGe1-x, particularly for x = 0.51. These alloys form high-quality single crystals. They are strongly disordered dynamically owing to the large Ge/Si mass ratio. This allows to study in function of disorder (x) the relations between the inhomogeneous broadening of acoustic waves, the Boson peak, and low-temperature thermal anomalies common to glasses. For x less than or equal to 0.51 we find no boson peak, apparently no plateau in the thermal conductivity, but at large x a Rayleigh law on the phonon width, Gamma proportional to Q(4), where Q is the scattering vector"@en . "RIV/61389005:_____/04:00101894" . . . "P(KSK1010104)" . . "1" . "Disperze a \u0161\u00ED\u0159ka p\u0159\u00ED\u010Dn\u00FDch akustick\u00FDch fonon\u016F byly m\u011B\u0159eny inelastick\u00FDm rozptylem neutron\u016F."@cs . "Roz\u0161\u00ED\u0159en\u00ED p\u0159\u00ED\u010Dn\u00FDch akustick\u00FDch fonon\u016F ve sm\u00ED\u0161en\u00FDch krystalech Si(x)Ge(1-x) vyvolan\u00E9 neuspo\u0159\u00E1danost\u00ED"@cs . "Salce, B." . "NL - Nizozemsko" . . . "Yonenaga, I." . . "disordered crystals;acoustic branches"@en . "254;257" . "Courtens, E." . "Kulda, Ji\u0159\u00ED" . "RIV/61389005:_____/04:00101894!RIV/2005/AV0/A49005/N" . . "4"^^ . "Inelastic neutron-scattering measurements of the dispersion and width of transverse acoustic branches are reported for SixGe1-x, particularly for x = 0.51. These alloys form high-quality single crystals. They are strongly disordered dynamically owing to the large Ge/Si mass ratio. This allows to study in function of disorder (x) the relations between the inhomogeneous broadening of acoustic waves, the Boson peak, and low-temperature thermal anomalies common to glasses. For x less than or equal to 0.51 we find no boson peak, apparently no plateau in the thermal conductivity, but at large x a Rayleigh law on the phonon width, Gamma proportional to Q(4), where Q is the scattering vector" . "Disorder-induced broadening of transverse acoustic phonons in SixGe1-x mixed crystals" . "Physica" . "[C1BC15F81D5B]" . "Roz\u0161\u00ED\u0159en\u00ED p\u0159\u00ED\u010Dn\u00FDch akustick\u00FDch fonon\u016F ve sm\u00ED\u0161en\u00FDch krystalech Si(x)Ge(1-x) vyvolan\u00E9 neuspo\u0159\u00E1danost\u00ED"@cs . "Disorder-induced broadening of transverse acoustic phonons in SixGe1-x mixed crystals"@en . "Beraud, A." . "560774" . "6"^^ . . "Disorder-induced broadening of transverse acoustic phonons in SixGe1-x mixed crystals"@en . . . . . "0921-4526" . "350" . "Foret, M." .