TITLE

Phonon lifetimes in bulk AlN and their temperature dependence

AUTHOR(S)
Kuball, M.; Hayes, J. M.; Hayes, J.M.; Shi, Ying; Ying Shi; Edgar, J. H.; Edgar, J.H.
PUB. DATE
September 2000
SOURCE
Applied Physics Letters;9/25/2000, Vol. 77 Issue 13
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We report on the Raman analysis of the phonon lifetimes of the A[sub 1](LO) (longitudinal optical) and E[sub 2](high) phonons in bulk AlN crystals and their temperature dependence from 10 to 1275 K. Our experimental results show that amongst the various possible decay channels, the A[sub 1](LO) phonons decay primarily into two phonons of equal energy (Klemens model), most likely longitudinal-acoustic phonons, whereas the E[sub 2](high) phonon decays asymmetrically into a high-energy and a low-energy phonon. Possible decay channels of the E[sub 2](high) phonon have been shown to include combinations of E[sub 2](low) and acoustic phonons. Phonon lifetimes of the A[sub 1](LO) phonon and the E[sub 2](high) phonon of 0.75 and 2.9 ps, respectively, were measured at 10 K. © 2000 American Institute of Physics.
ACCESSION #
4414925

 

Related Articles

  • Inversion of the K[sup p] = 1[sup �] States in [sup 156]Gd and [sup 170]Yb. Grigoriev, E.P. // Physics of Atomic Nuclei;Sep2003, Vol. 66 Issue 9, p1705 

    For the [sup 156]Gd and [sup 170]Yb nuclei, where the inversion of levels in the K[sup p] = 1[sup �] bands is observed, the energies of rotational levels are calculated on the basis of the Coriolis interaction model for the states of two bands whose quantum numbers are K[sup p] = 1[sup...

  • Phononless Thermal Conduction in Glasses at Ultralow Temperatures. Kagan, Yu.; Maksimov, L. A.; Polishchuk, I. Ya. // JETP Letters;1/25/2000, Vol. 71 Issue 2, p69 

    It is shown that the thermal conduction in dielectric glasses at ultralow temperatures is provided by energy transfer over the infinite cluster of resonance pairs of two-level systems. Expressions for the phononless thermal conductivity coefficient (~ T[sup 4/3]) and for the temperature of...

  • Substantial contribution of effective mass variation to electron-acoustic phonon interaction via... Pipa, V. I.; Mitin, V. V. // Applied Physics Letters;3/15/1999, Vol. 74 Issue 11, p1585 

    Studies the substantial contribution of effective mass variation to electron-acoustic phonon interaction. Deformation potential in semiconductor nanostructures; Use of the approach of deformed ions and tight binding; Deformation in narrow GaAs quantum wells.

  • Collection of athermal phonons into doped Ge thermistors using quasiparticle trapping. Grannan, S. M.; Young, B. A.; Lange, A. E.; Labov, S.; Sadoulet, B.; Emes, J.; Haller, E. E. // Journal of Applied Physics;5/15/1995, Vol. 77 Issue 10, p4887 

    Presents a study that developed a low-temperature particle detector that uses a novel quasiparticle trapping mechanism to funnel athermal phonon energy. Details on the pulse height spectra obtained by scanning; Principles of operation; Information on neutron transmutation doped germanium used...

  • Comment on 'Experimental determination of a longitudinal phonon dispersion curve in a... Bruch, L.W. // Journal of Chemical Physics;9/15/1997, Vol. 107 Issue 11, p4443 

    Evaluates the findings of an experiment to study a longitudinal phonon dispersion published in the 1997 issue of the periodical 'Journal of Chemical Physics.'

  • Response to 'Comment on 'Experimental determination of a longitudinal phonon dispersion curve in... Graham, A.P.; Bertino, M.F.; Hofmann, F.; Toennies, J.P.; Woll, Ch. // Journal of Chemical Physics;9/15/1997, Vol. 107 Issue 11, p4445 

    Explains the findings of an experiment to study a longitudinal phonon dispersion published in the 1997 issue of the periodical 'Journal of Chemical Physics,' to the critics of the research.

  • Effect of high pressure on the phonon spectra of Bi2223 in Andreev junctions. Svistunov, V.M.; Tarenkov, V.B.; D'yachenko, A.I.; Aoki, R. // Low Temperature Physics;Nov97, Vol. 23 Issue 11, p886 

    Focuses on the softening of the high-frequency modes of the phonon spectrum detected under pressure. Data showing that these modes correspond to breathing oxygen modes and to other vibrational modes of Cu-O; Explanations on the observed increase in a pressure ratio and parameter within the...

  • High frequency one-dimensional phononic crystal characterized with a picosecond transient grating photoacoustic technique. Dhar, Lisa; Rogers, John A. // Applied Physics Letters;8/28/2000, Vol. 77 Issue 9 

    Periodic patterns of relief defined on a substrate using conventional lithographic techniques are phononic crystals for surface localized acoustic waves. Picosecond transient grating characterization of the acoustic behavior of Rayleigh waves in structures of binary, one-dimensional patterns of...

  • Intervalence-band and band-to-band transitions in CuGaTe[sub 2] single crystal. Rincón, C.; Wasim, S. M.; Marín, G. // Journal of Applied Physics;9/1/2003, Vol. 94 Issue 5, p2999 

    A study of the temperature dependence of the heavy-hole-band–split-off-band E[sub hs] and of the heavy-hole-band–conduction-band E[sub G][sup A] transitions in single crystal of p-type CuGaTe[sub 2] was made from the analysis of optical absorption spectra. E[sub hs] and E[sub...

Share

Read the Article

Courtesy of VIRGINIA BEACH PUBLIC LIBRARY AND SYSTEM

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics