About: Disorder-induced broadening of transverse acoustic phonons in SixGe1-x mixed crystals

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About: Disorder-induced broadening of transverse acoustic phonons in SixGe1-x mixed crystals Goto Sponge NotDistinct Permalink

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	Disperze a šířka příčných akustických fononů byly měřeny inelastickým rozptylem neutronů. (cs) 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 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)
Title	Disorder-induced broadening of transverse acoustic phonons in SixGe1-x mixed crystals Disorder-induced broadening of transverse acoustic phonons in SixGe1-x mixed crystals (en) Rozšíření příčných akustických fononů ve smíšených krystalech Si(x)Ge(1-x) vyvolané neuspořádaností (cs)
skos:prefLabel	Disorder-induced broadening of transverse acoustic phonons in SixGe1-x mixed crystals Disorder-induced broadening of transverse acoustic phonons in SixGe1-x mixed crystals (en) Rozšíření příčných akustických fononů ve smíšených krystalech Si(x)Ge(1-x) vyvolané neuspořádaností (cs)
skos:notation	RIV/61389005:_____/04:00101894!RIV/2005/AV0/A49005/N
http://linked.open.../vavai/riv/strany	254;257
http://linked.open...avai/riv/aktivita	P
http://linked.open...avai/riv/aktivity	P(KSK1010104)
http://linked.open...iv/cisloPeriodika	1
http://linked.open...vai/riv/dodaniDat	2005
http://linked.open...aciTvurceVysledku	Kulda, Jiří
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Ústav jaderné fyziky AV ČR, v. v. i.
http://linked.open...dnocenehoVysledku	560774
http://linked.open...ai/riv/idVysledku	RIV/61389005:_____/04:00101894
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	disordered crystals;acoustic branches (en)
http://linked.open.../riv/klicoveSlovo	acoustic branches disordered crystals
http://linked.open...odStatuVydavatele	NL - Nizozemsko
http://linked.open...ontrolniKodProRIV	[C1BC15F81D5B]
http://linked.open...i/riv/nazevZdroje	Physica
http://linked.open...in/vavai/riv/obor	BG
http://linked.open...ichTvurcuVysledku	1 (xsd:int)
http://linked.open...cetTvurcuVysledku	6 (xsd:int)
http://linked.open...vavai/riv/projekt	Condensed matter physics and materials science
http://linked.open...UplatneniVysledku	2004
http://linked.open...v/svazekPeriodika	350
http://linked.open...iv/tvurceVysledku	Kulda, Jiří Foret, M. Salce, B. Beraud, A. Courtens, E. Yonenaga, I.
issn	0921-4526
number of pages	4 (xsd:int)

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