TITLE

Anharmonic decay of phonons in strain-free wurtzite AlN

AUTHOR(S)
Tischler, J. G.; Freitas, J. A.
PUB. DATE
September 2004
SOURCE
Applied Physics Letters;9/13/2004, Vol. 85 Issue 11, p1943
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We present Raman scattering measurements on high-quality freestanding AlN single crystals. Polarization studies provide clear identification of all allowed phonons. We report the smallest phonon linewidths observed in AlN, which provide a direct measurement of the anharmonic decay of phonons in this material. Also from the Raman mode frequencies and reported index of refraction values we estimated the ordinary and extraordinary dielectric constant values. The calculated values are considerably different from previously reported values of the dielectric constant of AlN.
ACCESSION #
14434616

 

Related Articles

  • Raman study of Ca3Co2O6 single crystals. Gohil, Smita; Iyer, Kartik K.; Aswathi, P.; Ghosh, Shankar; Sampathkumaran, E. V. // Journal of Applied Physics;Nov2010, Vol. 108 Issue 10, p103517 

    We report Raman scattering experiments on single crystals of Ca3Co2O6. The polarization dependent scattering was used to assign symmetry of the observed vibrational modes. The low temperature experiments show a subtle change in peak widths at 75 K. The increase in the peak widths is also...

  • Optical phonon behavior of columbite MgNb2O6 single crystals. Dapeng Xu; Wenqiang Liu; Qiang Zhou; Tian Cui; Hongming Yuan; Wenquan Wang; Ying Liu; Zhan Shi; Liang Li // Journal of Applied Physics;2014, Vol. 116 Issue 8, p083509-1 

    To explore potential applications, MgNb2O6 single crystal grown previously by optical floating zone method was used as a prototype for optical phonon behavior investigation. Polarized Raman spectra obtained in adequate parallel and crossed polarization were presented. All the obtained Raman...

  • Correlations of dielectric properties with electronic structure and phonon vibration of low loss tunable Ba0.4Sr0.6Ti1-yMnyO3 ceramics. Zhang, Jingji; Zhai, Jiwei; Zhang, Yewen // Journal of Applied Physics;Aug2011, Vol. 110 Issue 3, p034105 

    Correlations of dielectric properties with electronic structure and phonon vibration of Ba0.4Sr0.6Ti1-y MnyO3 (y = 0.00-0.20) ceramics were studied by using spectroscopic techniques. High level of Mn substitution prevented the reduction of Ti4+ and enhanced the charge ordering of Ti3+/Ti4+,...

  • Resonance Raman scattering of relaxors PbSc0.5Ta0.5O3 and PbSc0.5Nb0.5O3. Mihailova, B.; Bastjan, M.; Schulz, B.; Rübhausen, M.; Gospodinov, M.; Stosch, R.; Güttler, B.; Malcherek, T.; Bismayer, U. // Applied Physics Letters;1/22/2007, Vol. 90 Issue 4, p042907 

    Relaxor PbSc0.5Ta0.5O3 and PbSc0.5Nb0.5O3 single crystals are studied at room temperature using resonance Raman scattering. It is shown that the phonon modes associated with O localized BO6 vibrations in ferroic clusters strongly resonate in the vicinity of the maximum of the optical dielectric...

  • Vibration Spectra and the Valence Force Field of the LiCuVO4 Crystal. Shirokov, V. B.; Yuzyuk, Yu. I.; Torgashev, V. I.; Prokhorov, A. S. // Physics of the Solid State;Mar2005, Vol. 47 Issue 3, p539 

    Polarized Raman spectra of single-crystal LiCuVO4 containing quasi-one-dimensional cuprate chains are measured. The force constants of the valence force field are calculated for the phonon modes at the center of the Brillouin zone with an accuracy sufficient to describe the experiment. From the...

  • Raman study of phonons in bismuth triborate BiB3O6 crystal. Hu, Xiaobo; Wang, Jiyang; Teng, Bing; Loong, Chun-Keung; Grimsditch, Marcos // Journal of Applied Physics;2/1/2005, Vol. 97 Issue 3, p033501 

    A Raman-scattering study of the vibrational modes in a BiB3O6 crystal was conducted at room temperature. The numbers of external and internal modes obtained in experiment are consistent with the results of a group theoretical analysis. The Raman lines below ∼300 cm-1 and from ∼300 to...

  • Deep ultraviolet Raman scattering characterization of ion-implanted SiC crystals. Nakashima, S.; Mitani, T.; Senzaki, J.; Okumura, H.; Yamamoto, T. // Journal of Applied Physics;6/15/2005, Vol. 97 Issue 12, p123507 

    Multiple energy phosphorous ions were implanted into 4H-SiC at room temperature and at an elevated temperature (500 °C) followed by annealing at various temperatures. Deep ultraviolet Raman microscopy was used to analyze the effect of the implantation dose and postannealing temperature on the...

  • Terahertz dielectric properties of high-resistivity single-crystal ZnO. Azad, Abul K.; Han, Jiaguang; Zhang, Weili // Applied Physics Letters;1/9/2006, Vol. 88 Issue 2, p021103 

    We present experimental characterization of complex dielectric properties of high-resistivity single-crystal ZnO by terahertz time-domain spectroscopy in the frequency range extending from 0.3 to 3.5 THz. The measured refractive index, power absorption, and dielectric function are well fit by...

  • Nonlinear refraction in potassium gadolinium tungstate: An efficient Raman crystal and laser host. Dharmadhikari, J.A.; Dharmadhikari, A.K.; Kumar, G.R. // Applied Physics Letters;9/29/2003, Vol. 83 Issue 13, p2527 

    Third order nonlinear optical properties of a promising laser host and Raman shifting crystal—potassium gadolium tungstate are reported. The intensity dependent refractive index, n[sub 2], measured at 1064 and 532 nm are 8.76×10[sup -16] and 43.1×10[sup -16] cm[sup 2] W[sup -1],...

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