Phonon density of states of bulk gallium nitride

被引:91
作者
Nipko, JC
Loong, CK
Balkas, CM
Davis, RF
机构
[1] Argonne Natl Lab, Div Intense Pulsed Neutron Source, Argonne, IL 60439 USA
[2] N Carolina State Univ, Dept Mat Sci & Engn, Raleigh, NC 27695 USA
关键词
D O I
10.1063/1.121714
中图分类号
O59 [应用物理学];
学科分类号
摘要
We report the measured phonon density of states of a bulk GaN powder by time-of-Right neutron spectroscopy. The observed one-phonon excitation spectrum consists of two broad bands centered at about 23 and 39 meV corresponding to the acoustic and the first group of optical phonons; two sharp bands of upper optic modes at about 75 and 86 meV; and a gap of 45-65 meV. The phonon dispersion curves, lattice specific heat, and Debye temperature are calculated from fitting the data with a rigid-ion model. (C) 1998 American Institute of Physics.
引用
收藏
页码:34 / 36
页数:3
相关论文
共 39 条
  • [1] FIRST-ORDER RAMAN EFFECT IN WURTZITE-TYPE CRYSTALS
    ARGUELLO, CA
    ROUSSEAU, DL
    PORTO, SPS
    [J]. PHYSICAL REVIEW, 1969, 181 (03): : 1351 - &
  • [2] Optical phonons in GaN
    Azuhata, T
    Matsunaga, T
    Shimada, K
    Yoshida, K
    Sota, T
    Suzuki, K
    Nakamura, S
    [J]. PHYSICA B-CONDENSED MATTER, 1996, 219-20 : 493 - 495
  • [3] AZUHATA Y, 1995, J PHYS CONDENS MATT, V7, pL129
  • [4] Balkas C., 1995, POWDER DIFFR, V10, P266
  • [5] Synthesis routes and characterization of high-purity, single-phase gallium nitride powders
    Balkas, CM
    Davis, RF
    [J]. JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1996, 79 (09) : 2309 - 2312
  • [6] Barin I., 1995, THERMOCHEMICAL DATA, V1
  • [7] INFRARED LATTICE-VIBRATIONS AND FREE-ELECTRON DISPERSION IN GAN
    BARKER, AS
    ILEGEMS, M
    [J]. PHYSICAL REVIEW B, 1973, 7 (02): : 743 - 750
  • [8] 1ST ORDER RAMAN-SCATTERING IN GAN
    CINGOLANI, A
    FERRARA, M
    LUGARA, M
    SCAMARCIO, G
    [J]. SOLID STATE COMMUNICATIONS, 1986, 58 (11) : 823 - 824
  • [9] Davis RF, 1996, FESTKOR A S, V35, P1
  • [10] Raman determination of phonon deformation potentials in alpha-GaN
    Demangeot, F
    Frandon, J
    Renucci, MA
    Briot, O
    Gil, B
    Aulombard, RL
    [J]. SOLID STATE COMMUNICATIONS, 1996, 100 (04) : 207 - 210