Journal of the Physical Society of Japan

Online ISSN : 1347-4073
Print ISSN : 0031-9015
ISSN-L : 0031-9015

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Volume 67, Issue 2

Displaying 51-65 of 65 articles from this issue

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Kerr Effect of Some New Organic Kerr Solutions

Krishnamurthy Rajagopal, Tetali A. Prasada Rao, Balasubramaniam Viswan ...

Subject area: Optical properties and condensedmatter spectroscopy and other interactions of matter with particles and radiation.
1998 Volume 67 Issue 2 Pages 658-663
Published: February 01, 1998
Released on J-STAGE: October 01, 1999

DOIhttps://doi.org/10.1143/jpsj.67.658

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The electro optic Kerr constant of many new organic solutions comprising of the substituted aromatic carbonyl and nitrile compounds as solutes in nitrobenzene, for various molar concentrations of the solutes has been measured. We found several solutions having Kerr constants greater than that of nitrobenzene. The interactions between the components in these solutions have been established to be dipole-dipole in nature for the first time by conducting experiments and measuring the dipolemoments for solutions of various molar concentrations. The variations of the dipole moment with concentration in many solutions have been found to follow the same trend of variations of Kerr constant with molar concentration.

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Effect of Coulomb Interaction in the Resonant X-Ray Emission Spectra of Hexagonal BN

Ken–ichi Noba, Yosuke Kayanuma, Mihiro Yanagihara

Subject area: Optical properties and condensedmatter spectroscopy and other interactions of matter with particles and radiation.
1998 Volume 67 Issue 2 Pages 664-669
Published: February 01, 1998
Released on J-STAGE: October 01, 1999

DOIhttps://doi.org/10.1143/jpsj.67.664

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The resonant X-ray emission spectra for B 1s core excitation in h-BNare analyzed theoretically by a simple cluster model.It is shown that the observed spectral features are well reproduced bytaking into account the effect of core hole potential and the Coulomb interactions in the valence electrons. The anomalous reductionof the π-component in the spectator emission is explained as aresult of suppression of hybridization in the valence band due tothe screening of the core hole by the spectator electron.

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Alloying Effect on the n = 1 and n = 2 Excitons in Mixed K_1-xRb_xI Crystals

Satoshi Hashimoto, Minoru Itoh, Nobuhito Ohno

Subject area: Optical properties and condensedmatter spectroscopy and other interactions of matter with particles and radiation.
1998 Volume 67 Issue 2 Pages 670-674
Published: February 01, 1998
Released on J-STAGE: October 01, 1999

DOIhttps://doi.org/10.1143/jpsj.67.670

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Alloying effect on the exciton reflection spectra has been studied for mixedK_1-xRb_xI single crystals (0 ≤ x ≤ 1) at 10 K. Theshoulderlike structure of the n = 1 exciton band, which arises from theexciton-phonon interaction, is kept well over the whole concentration range. On the other hand, the multiple LO-phonon sidebands of the n = 2 exciton aresmeared out upon alloying. These results reveal that the alloying effect isvery sensitive to the spatial extension of excitons. Furthermore, free-excitonluminescence is observable even in the intermediate region of x, indicating that the exciton is not localized by the potential fluctuations in K_1-xRb_xI crystals.

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Resonant-Photoelectromagnetic Effects in Far-Infrared Regions for Compound Semiconductors

Tomonori Okashita, Hiromi Kobori, Tyuzi Ohyama

Subject area: Optical properties and condensedmatter spectroscopy and other interactions of matter with particles and radiation.
1998 Volume 67 Issue 2 Pages 675-678
Published: February 01, 1998
Released on J-STAGE: October 01, 1999

DOIhttps://doi.org/10.1143/jpsj.67.675

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The dc voltage generation associated with cyclotron resonance (CR) and impurity cyclotron resonance (ICR) in n-InGaAs and n-InSb has been studied. In both materials, it is found that the observed voltage decreases rapidly with increasing temperature and the line shape has similar structure to the absorption coefficient. Using a thermomagnetic model where a heat current induces a voltage through the Nernst-Ettingshausen effect, we have explained the experimental results. This technique allows us to investigate resonant absorption for a sample in which transmission measurements are difficult to perform, as well as to study the mechanism of phonon transport through the sample.

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Mössbauer Spectroscopic Study on Iron-Containing Biominerals in the Limpet Radula

Manabu Mizota, John Webb, Hiroshi Sakai, Yutaka Maeda

Subject area: Biophysics.
1998 Volume 67 Issue 2 Pages 679-681
Published: February 01, 1998
Released on J-STAGE: October 01, 1999

DOIhttps://doi.org/10.1143/jpsj.67.679

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Mössbauer measurements on iron-containing biominerals in the limpet radula have been carried out in the temperature range 5--420, K. Spectra show the same parameters and behavior as seen in goethite. The synthesis of iron-mineral in the limpet radula seems to occur only in the form of goethite among many iron oxides.

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Theoretical Analysis of Shape Transformations of Liposomes Caused by Microtubule Assembly

Tamiki Umeda, Hisao Nakajima, Hirokazu Hotani

Subject area: Biophysics.
1998 Volume 67 Issue 2 Pages 682-688
Published: February 01, 1998
Released on J-STAGE: October 01, 1999

DOIhttps://doi.org/10.1143/jpsj.67.682

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When a cytoskeletal protein, tubulin, is enclosed inside a liposome and the tubulin molecules assemble to form microtubules, a spherical liposome transforms into a rugby-ball shape due to the mechanical force generated by the microtubule assembly. Tubular projections of membrane then grow from both ends of the rugby-ball liposome, and finally the liposome transforms into a characteristic shape consisting of a central ellipsoid and straight tubes. Here we investigate mechanical aspects of the shape transformation of liposomes caused by microtubule assembly. We calculate the liposome shape using a mathematical model based on the notion of the minimum bending energy of the liposome membrane. The force generated by the microtubule assembly is incorporated in the model by considering the local force balance of the membrane. Numerical analysis of the model gives a series of shapes which are similar to the shapes observed in experiments. The force-transformation relationship obtained in our model predicts the existence of a critical force for the formation of tubular projections. The force exerted by microtubules is calculated using experimental data.

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Same Ratio Approximation for Density Perturbations in a Magnetized Electronegative Gas Positive Column

Michio Matsumoto

Subject area: The physics of plasmas and electric discharges.
1998 Volume 67 Issue 2 Pages 689-690
Published: February 01, 1998
Released on J-STAGE: October 01, 1999

DOIhttps://doi.org/10.1143/jpsj.67.689

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Comment on the Order of the Structural Phase Transition in NaV₆O₁₁

Makoto Iwata, Yoshihiro Ishibashi

Subject area: Equations of state, phase equilibria, and phase transitions.
1998 Volume 67 Issue 2 Pages 691-692
Published: February 01, 1998
Released on J-STAGE: October 01, 1999

DOIhttps://doi.org/10.1143/jpsj.67.691

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An Exact Form of the Mullins Model and a Property of its Classical Solution

Akihiko Kitada, Shuichi Nakamura

Subject area: Transport properties of condensed matter (nonelectronic).
1998 Volume 67 Issue 2 Pages 693-694
Published: February 01, 1998
Released on J-STAGE: October 01, 1999

DOIhttps://doi.org/10.1143/jpsj.67.693

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Off-Diagonal Contribution to Magnetic Moment of UO₂

Akira Narita

Subject area: Magnetic properties and materials.
1998 Volume 67 Issue 2 Pages 695-696
Published: February 01, 1998
Released on J-STAGE: October 01, 1999

DOIhttps://doi.org/10.1143/jpsj.67.695

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Analysis of the Triplet Excitation Spectrum in CaV₄O₉

Yoshiyuki Fukumoto, Akihide Oguchi

Subject area: Magnetic properties and materials.
1998 Volume 67 Issue 2 Pages 697-698
Published: February 01, 1998
Released on J-STAGE: October 01, 1999

DOIhttps://doi.org/10.1143/jpsj.67.697

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Comment on “Nonlinear Three-Dimensional Debye Screening in Plasmas”

Roberto A. Clemente, Pablo Martín

Subject area: The physics of plasmas and electric discharges.
1998 Volume 67 Issue 2 Pages 699
Published: February 01, 1998
Released on J-STAGE: October 01, 1999

DOIhttps://doi.org/10.1143/jpsj.67.699

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Reply to the Comment by R. A. Clemente and P. Martin

Chang Lin

Subject area: The physics of plasmas and electric discharges.
1998 Volume 67 Issue 2 Pages 700
Published: February 01, 1998
Released on J-STAGE: October 01, 1999

DOIhttps://doi.org/10.1143/jpsj.67.700

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Remark on \ “Shock Wave in a Nonlinear LC Circuit”

Willy Malfliet

Subject area: Mathematical methods in physics.
1998 Volume 67 Issue 2 Pages 701
Published: February 01, 1998
Released on J-STAGE: October 01, 1999

DOIhttps://doi.org/10.1143/jpsj.67.701

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Reply to the Remark by W. Malfliet on ''Shock Wave in a Nonlinear LC Circuit''

Shinsuke Watanabe, Shingo Ishiwata, Jun–ichi Ehara, Saburo Kakei

Subject area: Lattice dynamics and crystal statistics.
1998 Volume 67 Issue 2 Pages 702
Published: February 01, 1998
Released on J-STAGE: October 01, 1999

DOIhttps://doi.org/10.1143/jpsj.67.702

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