The importance of static strains in studies of thermal phonon scattering by strongly coupled impurities

1981 ◽  
Vol 14 (9) ◽  
pp. 1271-1279 ◽  
Author(s):  
J L Patel ◽  
J K Wigmore ◽  
J R Fletcher
Keyword(s):  
Phonon Scattering ◽  
Thermal Phonon ◽  
Strongly Coupled

scholarly journals Acoustic cavities in 2D heterostructures

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Maxim K. Zalalutdinov ◽  
Jeremy T. Robinson ◽  
Jose J. Fonseca ◽  
Samuel W. LaGasse ◽  
Tribhuwan Pandey ◽  
...  
Keyword(s):  
Sound Propagation ◽  
Phonon Scattering ◽  
Frequency Comb ◽  
Material Interfaces ◽  
Low Frequencies ◽  
Strongly Coupled ◽  
Propagation Analysis ◽  
Acoustic Cavities ◽  
Ab Initio Approach ◽  
Spatiotemporal Response

AbstractTwo-dimensional (2D) materials offer unique opportunities in engineering the ultrafast spatiotemporal response of composite nanomechanical structures. In this work, we report on high frequency, high quality factor (Q) 2D acoustic cavities operating in the 50–600 GHz frequency (f) range with f × Q up to 1 × 1014. Monolayer steps and material interfaces expand cavity functionality, as demonstrated by building adjacent cavities that are isolated or strongly-coupled, as well as a frequency comb generator in MoS2/h-BN systems. Energy dissipation measurements in 2D cavities are compared with attenuation derived from phonon-phonon scattering rates calculated using a fully microscopic ab initio approach. Phonon lifetime calculations extended to low frequencies (<1 THz) and combined with sound propagation analysis in ultrathin plates provide a framework for designing acoustic cavities that approach their fundamental performance limit. These results provide a pathway for developing platforms employing phonon-based signal processing and for exploring the quantum nature of phonons.

Thermal phonon scattering in Li-doped Si

1974 ◽  
Vol 9 (6) ◽  
pp. 2530-2538 ◽  
Author(s):  
D. Fortier ◽  
K. Suzuki
Keyword(s):  
Phonon Scattering ◽  
Thermal Phonon

Thermal phonon scattering at singlet-triplet donor states in cubic semiconductors

1985 ◽  
Vol 32 (12) ◽  
pp. 8234-8241 ◽  
Author(s):  
A. Puhl ◽  
E. Sigmund ◽  
J. Maier
Keyword(s):  
Phonon Scattering ◽  
Thermal Phonon ◽  
Donor States

Effect of p donors on thermal phonon scattering in SI

1976 ◽  
Vol 37 (2) ◽  
pp. 143-147 ◽  
Author(s):  
D. Fortier ◽  
K. Suzuki
Keyword(s):  
Phonon Scattering ◽  
Thermal Phonon

scholarly journals Direct determination of mode-projected electron-phonon coupling in the time domain

Science ◽  
2019 ◽  
Vol 366 (6470) ◽  
pp. 1231-1236 ◽  
Author(s):  
M. X. Na ◽  
A. K. Mills ◽  
F. Boschini ◽  
M. Michiardi ◽  
B. Nosarzewski ◽  
...  
Keyword(s):  
Time Domain ◽  
Phonon Scattering ◽  
Direct Determination ◽  
Spectral Weight ◽  
Characteristic Time Scale ◽  
Phonon Coupling ◽  
Strongly Coupled ◽  
Nonthermal Electrons ◽  
Electron Phonon Coupling ◽  
The Time Domain

Ultrafast spectroscopies have become an important tool for elucidating the microscopic description and dynamical properties of quantum materials. In particular, by tracking the dynamics of nonthermal electrons, a material’s dominant scattering processes can be revealed. Here, we present a method for extracting the electron-phonon coupling strength in the time domain, using time- and angle-resolved photoemission spectroscopy (TR-ARPES). This method is demonstrated in graphite, where we investigate the dynamics of photoinjected electrons at the K¯ point, detecting quantized energy-loss processes that correspond to the emission of strongly coupled optical phonons. We show that the observed characteristic time scale for spectral weight transfer mediated by phonon-scattering processes allows for the direct quantitative extraction of electron-phonon matrix elements for specific modes.

Effect of internal strains on thermal-phonon scattering in Li-doped Si

1980 ◽  
Vol 21 (12) ◽  
pp. 5651-5655 ◽  
Author(s):  
A. Adolf ◽  
D. Fortier ◽  
J. H. Albany ◽  
K. Suzuki
Keyword(s):  
Phonon Scattering ◽  
Thermal Phonon ◽  
Internal Strains
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