Nonlinear ultrasonic attenuation in glasses

Arnold, W.; Hunklinger, Siegfried; Stein, S.; Dransfeld, Klaus

doi:10.1016/0022-3093(74)90029-5

Cited by 77 publications

(31 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Both dependencies are nicely observed in experiments (Arnold et al (1974)), see Fig. For Iiw « kBT, WT2 » 1, one obtains ares ex w 2 /T for 1/ Ie1 « 1 and ares ex (w 2 /T)( led I) 1/2 at 1/ leI » 1.…”

Section: Resonant and Relaxation Processessupporting

confidence: 75%

Tunneling Systems in Amorphous and Crystalline Solids

Esquinazi¹

1998

128

View full text Add to dashboard Cite

Section: Resonant and Relaxation Processessupporting

confidence: 75%

Tunneling Systems in Amorphous and Crystalline Solids

Esquinazi¹

1998

128

View full text Add to dashboard Cite

“…At higher powers, the two-level systems (TLSs) become saturated, and the damping rate goes down. Such a process was suggested as an explanation of power-dependent attenuation losses in glasses [27][28][29], and also was used to describe power-dependent dielectric losses in superconducting electrical resonators [30]. For such a saturation result in nonlinear damping effects, the level spacing of the TLSs should be larger than the bath temperature.…”

Section: η 1+cmentioning

confidence: 99%

Negative nonlinear damping of a multilayer graphene mechanical resonator

et al. 2016

View full text Add to dashboard Cite

We experimentally investigate the nonlinear response of a multilayer graphene resonator using a superconducting microwave cavity to detect its motion. The radiation pressure force is used to drive the mechanical resonator in an optomechanically induced transparency configuration. By varying the amplitudes of drive and probe tones, the mechanical resonator can be brought into a nonlinear limit. Using the calibration of the optomechanical coupling, we quantify the mechanical Duffing nonlinearity. By increasing the drive force, we observe a decrease in the mechanical dissipation rate at large amplitudes, suggesting a negative nonlinear damping mechanism in the graphene resonator. Increasing the optomechanical backaction, we observe a nonlinear regime not described by a Duffing response that includes new instabilities of the mechanical response.

show abstract

“…This is because of the &function appearing in (14). From (13) and (16) we obtain n Under the approximations being used here, q' = q and consequently 0 Q = 2p sin -2 (17) so that QZ = 2w2w-2(1 -cos e) .…”

Section: Relaxation Timementioning

confidence: 94%

Scattering of phonons by density fluctuations and thermal conductivity of amorphous solids

Joshi¹

1979

Physica Status Solidi (b)

View full text Add to dashboard Cite

Phonon relaxation time due t o the scattering by spatial density fluctuations is studied in amorphous solids. The relaxation time Tf is found t o vary with frequency w as in the case of phonons with frequencies small compared with wo, which is a parameter characteristic of the density fluctuations. When w is large in comparison with wo, t f is found to vary as w -~, and thus it undergoes a transition from a strong to a comparatively weak frequency dependence as w increases and crosses wo. It is discussed that the thermal conductivity of a typical amorphous solid can be explained in terms of the scattering by low lying tunnelling states and scattering by fluctuations in density and elasticity. The plateau in conductivity is interpreted as defining a temperature region where the former scattering mechanism with its comparatively weaker frequency dependence st,arts losing dominance over the latter. Finally the conductivity of vitreous silica is analysed, obtaining

show abstract

Nonlinear ultrasonic attenuation in glasses

Cited by 77 publications

References 15 publications

Tunneling Systems in Amorphous and Crystalline Solids

Tunneling Systems in Amorphous and Crystalline Solids

Negative nonlinear damping of a multilayer graphene mechanical resonator

Scattering of phonons by density fluctuations and thermal conductivity of amorphous solids

Contact Info

Product

Resources

About