Temperature Dependence of Attenuation of 3- and 9-GHz Ultrasound in Rutile (Ti<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">O</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>)

Pomerantz, M.; Grossman, Steven H.; Koo, Ja−Yong

doi:10.1103/physrevb.8.5828

Cited by 7 publications

(2 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The thin film is situated on a crystal surface. Also, there are measurements with scattering method of slow neutrons, for instance, in NaFl 7 [20], where there are both optical and acoustical phonon branches. Probably, it is possible to write 'heat phonons' ('thermal phonons' or 'resistive phonons') instead of 'negative rotons' in the liquid helium-II.…”

Section: The Three-phonon-phonon and Four-phonon-phonon Processesmentioning

confidence: 98%

See 1 more Smart Citation

Creation evidence of the second non-dispersive Zakharenko wave by helium atomic beams in superfluid helium-II at low temperatures

Zakharenko¹

2007

Pramana - J Phys

View full text Add to dashboard Cite

In this work, the experimental results of the creation of the second nondispersive Zakharenko wave (C ph = Cg = 0) in the negative roton branch (the so-called second sound) of the bulk elementary excitations (BEEs) energy spectra are introduced. Several BEE signals detected by a bolometer situated in the isotopically pure liquid helium-II at low temperatures ∼100 mK are shown, which give evidence of negative roton creation in the liquid by helium atomic beams striking the liquid surface. The negative roton signals were clearly distinguished by the following ways: the negative roton signal created by helium atomic beams appeared earlier than the positive roton signal created by the beams, and presence of both positive and negative roton signals together. It is natural that the negative roton creation by the beams requires the 4 He-atom energies ∼12 K, while the positive roton creation by the atomic beams requires energies ∼35 K. Therefore, successive increase in the heater power resulting in an increase in the 4 He-atom energies gives solid evidence that the negative rotons are first created in the liquid by the helium atomic beams.

show abstract

Section: The Three-phonon-phonon and Four-phonon-phonon Processesmentioning

confidence: 98%

“…It is noted that solids are also investigated at low temperatures, where heat phonons can propagate (see refs [18][19][20]). They can also be created by a thin film of 1 mm 2 square heated by the short pulses ∼10 ns to 100 ns.…”

Section: The Three-phonon-phonon and Four-phonon-phonon Processesmentioning

confidence: 99%

Creation evidence of the second non-dispersive Zakharenko wave by helium atomic beams in superfluid helium-II at low temperatures

Zakharenko¹

2007

Pramana - J Phys

View full text Add to dashboard Cite

show abstract

The effect of energy conservation surface overlap breakdown on the low‐temperature ultrasonic attenuation in dielectrics

Nava

1986

Physica Status Solidi (b)

View full text Add to dashboard Cite

Short Notes K8 1 phys. stat. sol. (b) 133, K81 (1986) Subject classification: 62.65 and 77.50 Instituto Venezolano de Investigaciones C i e n t k c a s (NIC), Centro de Ffsica, Caracas1) The Effect of Energy Conservation Surface Overlap Breakdown on the Low-Temperature Ultrasonic Attenuation in DielectricsThe absorption of high frequency acoustic waves in dielectrics at low tempera t u r e s when 1;24 >> 1, where ! 2 is the ultrasonic frequency and < is the mean thermal phonon relaxation time, is explained by three-phonon anharmonic N-

show abstract

Effects of low-lying phonon modes on the anomalous temperature dependence of the elastic constants of rutile and quartz

Nava

Oentrich

1998

Journal of Physics and Chemistry of Solids

View full text Add to dashboard Cite

Temperature Dependence of Attenuation of 3- and 9-GHz Ultrasound in Rutile (TiO2)

Cited by 7 publications

References 24 publications

Creation evidence of the second non-dispersive Zakharenko wave by helium atomic beams in superfluid helium-II at low temperatures

Creation evidence of the second non-dispersive Zakharenko wave by helium atomic beams in superfluid helium-II at low temperatures

The effect of energy conservation surface overlap breakdown on the low‐temperature ultrasonic attenuation in dielectrics

Effects of low-lying phonon modes on the anomalous temperature dependence of the elastic constants of rutile and quartz

Contact Info

Product

Resources

About