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Title: Intrinsic to extrinsic phonon lifetime transition in a GaAs–AlAs superlattice

Journal Article · · Journal of Physics. Condensed Matter
 [1];  [2];  [2];  [2];  [2];  [2];  [2];  [2]
  1. Univ. of Oxford (United Kingdom); Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
  2. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)

We have measured here the lifetimes of two zone-center longitudinal acoustic phonon modes, at 320 and 640 GHz, in a 14 nm GaAs/2 nm AlAs superlattice structure. By comparing measurements at 296 and 79 K we separate the intrinsic contribution to phonon lifetime determined by phonon–phonon scattering from the extrinsic contribution due to defects and interface roughness. At 296 K, the 320 GHz phonon lifetime has approximately equal contributions from intrinsic and extrinsic scattering, whilst at 640 GHz it is dominated by extrinsic effects. These measurements are compared with intrinsic and extrinsic scattering rates in the superlattice obtained from first-principles lattice dynamics calculations. The calculated room-temperature intrinsic lifetime of longitudinal phonons at 320 GHz is in agreement with the experimentally measured value of 0.9 ns. The model correctly predicts the transition from predominantly intrinsic to predominantly extrinsic scattering; however the predicted transition occurs at higher frequencies. Our analysis indicates that the 'interfacial atomic disorder' model is not entirely adequate and that the observed frequency dependence of the extrinsic scattering rate is likely to be determined by a finite correlation length of interface roughness.

Research Organization:
Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0001299; FG02-09ER46577; FG02-00ER15087
OSTI ID:
1382603
Journal Information:
Journal of Physics. Condensed Matter, Vol. 25, Issue 29; ISSN 0953-8984
Publisher:
IOP PublishingCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 7 works
Citation information provided by
Web of Science

References (42)

Nanoscale thermal transport journal January 2003
Thermal conductivity of GaAs/AlAs superlattices journal March 1999
Thermal-conductivity measurements of GaAs/AlAs superlattices using a picosecond optical pump-and-probe technique journal March 1999
Phonon group velocity and thermal conduction in superlattices journal July 1999
Molecular dynamics calculation of the In-plane thermal conductivity of GaAs/AlAs superlattices journal January 2003
Lattice thermal conductivity in superlattices: molecular dynamics calculations with a heat reservoir method journal December 2003
Coherent Oscillation of Zone-Folded Phonon Modes in GaAs-AlAs Superlattices journal August 1994
Ultrafast optical generation and remote detection of terahertz sound using semiconductor superlattices journal July 2007
Optimized optical generation and detection of superlattice acoustic phonons journal March 2009
Subterahertz monochromatic acoustic wave propagation using semiconductor superlattices as transducers journal December 2008
Acoustic-phonon propagation in superlattices journal July 1988
Finite-size effects on coherent folded acoustic phonons in GaAs/AlAs superlattices journal January 2002
Thermal conductivity and ballistic-phonon transport in the cross-plane direction of superlattices journal June 1998
Molecular dynamics calculation of the thermal conductivity of superlattices journal June 2002
Intrinsic lattice thermal conductivity of Si/Ge and GaAs/AlAs superlattices journal June 2008
Thermal conductivity of GaAs/AlAs superlattices and the puzzle of interfaces journal November 2010
Thermal conductivity of semiconductor superlattices: Experimental study of interface scattering journal April 2009
Picosecond ultrasonic measurements of attenuation of longitudinal acoustic phonons in silicon journal November 2009
Attenuation and velocity of 56 GHz longitudinal phonons in gallium arsenide from 50 to 300 K journal September 1994
Selective Optical Generation of Coherent Acoustic Nanocavity Modes journal June 2007
Lifetime of THz Acoustic Nanocavity Modes journal January 2009
Lifetime of sub-THz coherent acoustic phonons in a GaAs-AlAs superlattice journal January 2013
Spectral analysis of high-harmonic coherent acoustic phonons in piezoelectric semiconductor multiple quantum wells journal March 2003
Transition from piezoelectric to deformation potential mechanism of hypersound photogeneration in n -doped GaAs semiconductors journal March 2011
Elastic properties of GaAs/AlAs superlattices journal August 1990
Role of Low-Energy Phonons in Thermal Conduction journal August 1954
Intrinsic phonon relaxation times from first-principles studies of the thermal conductivities of Si and Ge journal February 2010
Heat transport in silicon from first-principles calculations journal August 2011
Electrons and Phonons book January 2001
Coherent Generation of Acoustic Phonons in an Optical Microcavity journal November 2007
Coherent Phonon Heat Conduction in Superlattices journal November 2012
Isotope scattering of dispersive phonons in Ge journal January 1983
Structure and phase stability of Ga x In 1 x P solid solutions from computational alchemy journal June 1994
Role of Disorder and Anharmonicity in the Thermal Conductivity of Silicon-Germanium Alloys: A First-Principles Study journal January 2011
QUANTUM ESPRESSO: a modular and open-source software project for quantum simulations of materials journal September 2009
Special points for Brillouin-zone integrations journal June 1976
Ab initio calculation of phonon dispersions in II-VI semiconductors journal February 1993
Ab initio calculation of the linewidth of various phonon modes in germanium and silicon journal April 2003
Theory of interface scattering of phonons in superlattices journal October 2010
Lattice Thermal Conductivity of Disordered Semiconductor Alloys at High Temperatures journal September 1963
Vibrations of a mixed crystal: Neutron scattering from Ni 55 Pd 45 journal August 1974
Column ratio mapping: A processing technique for atomic resolution high-angle annular dark-field (HAADF) images journal December 2008

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