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Statements

Subject Item
n2:RIV%2F61389005%3A_____%2F04%3A00101894%21RIV%2F2005%2FAV0%2FA49005%2FN
rdf:type
skos:Concept n16:Vysledek
dcterms:description
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 Disperze a šířka příčných akustických fononů byly měřeny inelastickým rozptylem neutronů. 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
dcterms:title
Disorder-induced broadening of transverse acoustic phonons in SixGe1-x mixed crystals Rozšíření příčných akustických fononů ve smíšených krystalech Si(x)Ge(1-x) vyvolané neuspořádaností Disorder-induced broadening of transverse acoustic phonons in SixGe1-x mixed crystals
skos:prefLabel
Rozšíření příčných akustických fononů ve smíšených krystalech Si(x)Ge(1-x) vyvolané neuspořádaností Disorder-induced broadening of transverse acoustic phonons in SixGe1-x mixed crystals Disorder-induced broadening of transverse acoustic phonons in SixGe1-x mixed crystals
skos:notation
RIV/61389005:_____/04:00101894!RIV/2005/AV0/A49005/N
n5:strany
254;257
n5:aktivita
n6:P
n5:aktivity
P(KSK1010104)
n5:cisloPeriodika
1
n5:dodaniDat
n12:2005
n5:domaciTvurceVysledku
n7:3883973
n5:druhVysledku
n9:J
n5:duvernostUdaju
n10:S
n5:entitaPredkladatele
n15:predkladatel
n5:idSjednocenehoVysledku
560774
n5:idVysledku
RIV/61389005:_____/04:00101894
n5:jazykVysledku
n17:eng
n5:klicovaSlova
disordered crystals;acoustic branches
n5:klicoveSlovo
n8:acoustic%20branches n8:disordered%20crystals
n5:kodStatuVydavatele
NL - Nizozemsko
n5:kontrolniKodProRIV
[C1BC15F81D5B]
n5:nazevZdroje
Physica
n5:obor
n11:BG
n5:pocetDomacichTvurcuVysledku
1
n5:pocetTvurcuVysledku
6
n5:projekt
n14:KSK1010104
n5:rokUplatneniVysledku
n12:2004
n5:svazekPeriodika
350
n5:tvurceVysledku
Salce, B. Yonenaga, I. Courtens, E. Kulda, Jiří Beraud, A. Foret, M.
s:issn
0921-4526
s:numberOfPages
4