Phonon stop bands in amorphous superlattices

Koblinger, O.; Mebert, J.; Dittrich, E.; Döttinger, S.; Eisenmenger, Wolfgang; Santos, P. V.; Ley, L.

doi:10.1103/physrevb.35.9372

Cited by 50 publications

(25 citation statements)

References 3 publications

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“…[1][2][3][4][5][6][7][8][9][10][11] The SL's actually grown are not ideal and they usually possess both natural and artificial defects. In particular, an inhomogeneity embedded in a SL with perfect periodicity ͑e.g., a defect layer or a free surface͒ is shown to cause localized vibrations within the frequency gaps induced by the periodicity of a SL.…”

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confidence: 99%

Resonant interaction of phonons with surface vibrational modes in a finite-size superlattice

Mizuno

Tamura

1996

Phys. Rev. B

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We study theoretically the interaction of phonons with surface vibrational modes in a finite-size superlattice with a free surface. A phonon incident normally on the superlattice from a substrate is perfectly reflected, i.e., the reflection rate is unity irrespective of frequency. However, it comes back to the substrate with a large time delay when the frequency coincides with an eigenfrequency of the surface mode. This result is attributable to the resonant interaction of incident phonons with a vibrational mode localized near the surface.Acoustic vibrations in superlattices ͑SL's͒ with various stacking order, such as periodic, quasiperiodic, and random superlattices have been investigated extensively during the last decade.

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confidence: 99%

Resonant interaction of phonons with surface vibrational modes in a finite-size superlattice

Mizuno

Tamura

1996

Phys. Rev. B

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“…with the use of phonon spectroscopy. [2][3][4] In the calculation of the dispersion relations, the perfect periodicity should be assumed and the periodic boundary condition is applied. On the other hand, in the realistic SL, various kinds of inhomogeneity are embedded.…”

Section: Introductionmentioning

confidence: 99%

“…As a numerical example, in Sec. III we apply this analytical formula to the GaAs-͑GaAs/AlAs͒ N -H 2 O and GaAs-͑GaAs/AlAs͒ N - 4 He systems. The result Kato calculated numerically is also reproduced in this section.…”

Section: Introductionmentioning

confidence: 99%

Theoretical study on resonant transmission of acoustic phonons propagating through a superlattice-liquid interface

Mizuno

2000

Phys. Rev. B

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We theoretically studied the resonant interaction of acoustic phonons with the vibrational mode localized near a superlattice-liquid interface. We calculated the phonon transmission rate and examined the peculiar resonance peak due to the localized mode. The peak value depends on the number of periods ͑N͒ of the superlattice, and this resonant feature disappears for large N and also small N. We derived the formula describing the resonance line and discussed the condition for such a resonance to be seen.

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“…The ability to emit and detect controllable nonthermal phonon spectra, as described here, thus constitutes a prototype for a microfabricated "phonon spectrometer" suitable for the study of phonon transport through nanostructures. 1, 2 While some past STJ-based studies explored phonon bandgaps in simple 1-dimensional superlattices, 5 we suggest that in the geometry demonstrated here a variety of nanostructures may be introduced by interposing them into the ballistic path, either by etching them into a silicon mesa or fixing them into a trench such as appears in Figure 1(c). Resonant scattering impurities may also be introduced into the phonon path in the crystal to serve as spectral reference points.…”

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confidence: 99%

“…[1][2][3][4][5] Existing methods to study thermal transport in dielectric structures permit either (a) spectrally resolved measurements of phonon modes in bulk-size samples, 3,4,6 or (b) measurement of total heat transmission (thermal conductance) in nanoscale samples. [7][8][9][10][11] However, the latter type of measurement cannot distinguish among phonon modes and cannot tell whether the phonons scatter inelastically in transit.…”

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confidence: 99%

Non-equilibrium phonon generation and detection in microstructure devices

Hertzberg

Otelaja

Yoshida

et al. 2011

Review of Scientific Instruments

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We demonstrate a method to excite locally a controllable, non-thermal distribution of acoustic phonon modes ranging from 0 to ∼200 GHz in a silicon microstructure, by decay of excited quasiparticle states in an attached superconducting tunnel junction (STJ). The phonons transiting the structure ballistically are detected by a second STJ, allowing comparison of direct with indirect transport pathways. This method may be applied to study how different phonon modes contribute to the thermal conductivity of nanostructures.

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Phonon stop bands in amorphous superlattices

Cited by 50 publications

References 3 publications

Resonant interaction of phonons with surface vibrational modes in a finite-size superlattice

Resonant interaction of phonons with surface vibrational modes in a finite-size superlattice

Theoretical study on resonant transmission of acoustic phonons propagating through a superlattice-liquid interface

Non-equilibrium phonon generation and detection in microstructure devices

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