Journal of the Physical Society of Japan
Online ISSN : 1347-4073
Print ISSN : 0031-9015
ISSN-L : 0031-9015
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Volume 52, Issue 1
Displaying 51-60 of 60 articles from this issue
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  • Raman Scattering with Multiphonon Process in Single Crystal of α-NiSO4·6H2O
    L. S. G. Cancela, J. G. Ramos, G. M. Gualberto
    1983 Volume 52 Issue 1 Pages 295-303
    Published: January 15, 1983
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.52.295
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    The Raman spectrum of α-NiSO4·6H2O was obtained at room temperature and 77 K. A theoretical study of the number, type and activity of the optical phonons in this material permitted a classification of the observed phonons. The data showed an anomalous temperature dependence for the peaks at 75 and 115 cm−1 with symmetry A1. The Raman spectrum (0 to 150 cm−1) of the B2 phonons at several temperatures from 77 K to room temperature was also obtained. The line at 42 cm−1 at T=300 K has a temperature dependence characteristic of difference combination of two other phonons. Another line of the same symmetry, which would be the sum combination of those two phonons, has a temperature dependence of its intensity characteristic of a one phonon line.
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  • The Fundamental Optical Absorption and the Valence Bands in Alkali Cuprous Halide Crystals
    Satoshi Sasaki, Mikihiko Ikezawa, Kenji Sato, Shozo Kono, Takasi Sagaw ...
    1983 Volume 52 Issue 1 Pages 304-311
    Published: January 15, 1983
    Released on J-STAGE: May 29, 2007
    DOIhttps://doi.org/10.1143/JPSJ.52.304
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    In K2CuCl3 and K2CuBr3 crystals, the fundamental optical absorption has been found to be at about 4.5 eV from the reflectivity measurement. An intrinsic luminescence band due to a forbidden transition has been found at about 3.2 eV in both crystals. From the observation of the X-ray photoelectron spectrum, a conclusion is drawn that the top of the valence band is the d-band of the curprous ion. The properties of the fundamental absorption and the luminescence are consistent with this conclusion.
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  • Raman Study on the High Temperature Transition in V2O3
    Atsushi Okamoto, Yoshitaka Fujita, Chiei Tatsuyama
    1983 Volume 52 Issue 1 Pages 312-317
    Published: January 15, 1983
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.52.312
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    We have measured the Raman scatterings of V2O3 and (V0.985Cr0.015)2O3 in the temperature range between 300 and 600 K. The Raman frequencies of A1g phonon modes in V2O3 show some softening and recovery with a minimum at 480 K in the region of the high temperature transition. Those in (V0.985Cr0.015)2O3 decrease monotonically with temperature. The ratio of the scattering intensity of the lowest frequency Eg mode to the lower frequency A1g mode decreases with temperature in V2O3. On the other hand, the ratio in (V0.985Cr0.015)2O3 is relatively independent of temperature. These experimental results are discussed in light of the two-bands crossing model proposed by Zeiger for the high temperature transition in V2O3. The Raman lines due to A1g phonon mode show an anomalous asymmetric line shape, which is interpreted by the Fano resonance effect between the A1g phonon and the electronic transitions in an a1g-bonding band.
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  • Numerical Experiments on the Absorption Lineshape of the Exciton under Lattice Vibrations. IV. The Indirect Edge
    Michael Schreiber, Yutaka Toyozawa
    1983 Volume 52 Issue 1 Pages 318-326
    Published: January 15, 1983
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.52.318
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    Employing the standard model of exciton-phonon interaction we compute the lineshape of the indirect exciton absorption edge. Around the absorption edge the features of the density of states are reproduced; for the tail at lower energy the empirical Urbach rule is established in its exponential decay, with a decay constant proportional to inverse temperature in three and two dimensions. The analysis of the average oscillator strength per state furnishes proof that the Urbach tail is caused by “momentarily localized” exciton states appearing below the exciton band due to thermal lattice vibrations. We derive steepness indices of 0.85 and 0.80 for the three- and two-dimensional indirect absorption tails to correlate the occurrence of exciton self-trapping and the steepness of the Urbach tail. Excellent agreement with the optical study on mixed silver halide crystals is obtained.
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  • Raman Scattering Spectra of Methane in Solid Rare Gases
    Minoru Sagara, Mikihiko Ikezawa
    1983 Volume 52 Issue 1 Pages 327-332
    Published: January 15, 1983
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.52.327
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    Raman scattering spectra of ν1 and ν3 vibrational modes of methane have been observed for CH4 and CD4 in solid Kr, and for CH4 in solid Xe. Fine structures due to the vibration-rotation states have been resolved in the spectrum of the ν3 mode. The observed fine structures in the spectrum of CH4 in Kr are examined to be in a good agreement with the theory of Kobashi, Kataoka and Yamamoto. The prominent doublet structures in this spectrum are due to the S-branch (ΔJ=2) type transitions from the lowest rotational state of the A-methane.
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  • Kink Excitations in Chiral Smectic C Liquid Crystal
    Mamoru Yamashita, Hatsuo Kimura
    1983 Volume 52 Issue 1 Pages 333-337
    Published: January 15, 1983
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.52.333
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    A kink of tilt angle in the helicoidal Sm C* structure is investigated. In the vicinity of the Sm C*-Sm A transition point, such excitation is mathematically the same to that of φ4-model of double minimum potential. Both excitations of kink and anti-kink can increase the number of turns in the helicoidal structure and these effects are examined to explain the anomalous temperature-dependence of pitch observed near the Sm C*-Sm A transition.
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  • Nature of Angle-Resolved Electron Energy Loss Spectrum
    Yasuhiro Ohkawa, Kohji Yamada, Takaaki Kawamura
    1983 Volume 52 Issue 1 Pages 338-343
    Published: January 15, 1983
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.52.338
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    Angle-resolved electron energy loss spectroscopy (AREELS) has been studied on the Si(111)7×7 surface by using a retarding field analyzer in a medium electron energy range (150≤Ep≤1000 eV) at the glancing incidence. Some fine structures are distinctly observed of surface and bulk state transitions as well as plasmon losses in the energy distribution curves N(E) at the specular Bragg reflection, but no transitions except for plasmon losses are observed at the back-ground position. AREELS spectra at the specular Bragg reflection are compared with those at the background position and with conventional angle-integrated electron energy loss spectra. AREELS spectra at the specular reflection are measured as a function of the primary energy around Bragg conditions.
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  • Entrained, Harmonic, Quasiperiodic and Chaotic Responses of the Self-Sustained Oscillation of Nitella to Sinusoidal Stimulation
    Hatsuo Hayashi, Masahiro Nakao, Kazuyoshi Hirakawa
    1983 Volume 52 Issue 1 Pages 344-351
    Published: January 15, 1983
    Released on J-STAGE: May 29, 2007
    DOIhttps://doi.org/10.1143/JPSJ.52.344
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    The response of the self-sustained oscillation of the Nitella internodal cell to the sinusoidal stimulation was investigated. The phase diagram was made up from power spectra and stroboscopic representation; there exist entrained, harmonic, quasiperiodic and chaotic oscillations. The stroboscopic mapping of the chaotic oscillation forms a strange attractor and the stroboscopic transition function admits period three. This indicates that there exists chaotic behavior assured by the Li-Yorke theorem.
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  • Addendum to a Functional Treatise on Statistical Hydromechanics with Random Force Action
    Iwao Hosokawa
    1983 Volume 52 Issue 1 Pages 352
    Published: January 15, 1983
    Released on J-STAGE: May 29, 2007
    DOIhttps://doi.org/10.1143/JPSJ.52.352
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  • Magnetic Equation of State in a Substitutionally Random Ferromagnet, EuxSr1−xS
    Kiiti Siratori, Kay Kohn, Hidenori Suwa, Eiji Kita, Shohei Tamura, Fum ...
    1983 Volume 52 Issue 1 Pages 353
    Published: January 15, 1983
    Released on J-STAGE: May 29, 2007
    DOIhttps://doi.org/10.1143/JPSJ.52.353
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