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Journal Articles

Understanding muon diffusion in perovskite oxides below room temperature based on harmonic transition state theory

Ito, Takashi; Higemoto, Wataru; Shimomura, Koichiro*

Physical Review B, 108(22), p.224301_1 - 224301_11, 2023/12

 Times Cited Count:5 Percentile:44.45(Materials Science, Multidisciplinary)

Journal Articles

Global ${it ab initio}$ potential energy surfaces for the lowest three doublet states (1$$^{2}$$A', 2$$^{2}$$A', and 1$$^{2}$$A") of the BrH$$_{2}$$ system

Kurosaki, Yuzuru; Takayanagi, Toshiyuki

Journal of Chemical Physics, 119(15), p.7838 - 7856, 2003/10

 Times Cited Count:26 Percentile:62.97(Chemistry, Physical)

Adiabatic potential energy surfaces of the lowest three doublet states (1$$^{2}$$A', 2$$^{2}$$A', and 1$$^{2}$$A") for the BrH$$_{2}$$ system have been calculated globally using the MRCI+Q method with the aug-cc-pVTZ basis set. Spin-orbit effects were considered on the basis of Breit-Pauli Hamiltonian. The calculated adiabatic energies were fitted to the analytical functional form of many-body expansion. The barrier heights of the abstraction and exchange reactions on the ground-state PES were calculated to be 1.28 and 11.71 kcal mol$$^{-1}$$, respectively, at the MRCI+Q/aug-cc-pVTZ level of theory. The fits for the three PESs were successful within the accuracy of 0.1 kcal mol$$^{-1}$$. Thermal rate constants for the abstraction and exchange reactions and their isotopic variants were calculated with the fitted 1$$^{2}$$A' PES using the ICVT/LAG method. The calculated rate constants for the abstarction reactions agree fairly well with experiment but those for the exchange reactions were much smaller than experiment, which suggests that the reliable experimental data are still insufficient.

Journal Articles

Vortex dissipation and level dynamics for the layered superconductors with impurities

Fujita, Ayumi

Physical Review B, 64(6), p.064504_1 - 064504_6, 2001/08

 Times Cited Count:0 Percentile:0.00(Materials Science, Multidisciplinary)

We study parametric level statistics of the discretized excitation spectra inside a moving vortex core in layered superconductors with impurities. The universal conductivity is evaluated numerically for the various values of rescaled vortex velocities $$kappa$$ from the clean case to the dirty limit case. The random matrix theoretical prediction is verified numerically in the large $$kappa$$ regime. On the contrary in the low velocity regime, we observe $$sigma_{xx} propto kappa^{2/3}$$which is consistent with the theoretical result for the super-clean case, where the energy dissipation is due to the Landau-Zener transition which takes place at the points called ``avoided crossing''.

Journal Articles

Flow regime transitions in high-pressure steam-water horizontal pipe two-phase flow

Nakamura, Hideo; Anoda, Yoshinari; Kukita, Yutaka

ANS Proc. 1991 National Heat Transfer Conf., Vol. 5, p.269 - 276, 1991/00

no abstracts in English

Journal Articles

Theory of supercooled liquids and glasses for binary soft-sphere mixtures via modified hypernetted-chain integral equation

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Physical Review A, 42(4), p.2176 - 2183, 1990/08

 Times Cited Count:5 Percentile:36.30(Optics)

no abstracts in English

Journal Articles

Improved integral equation for highly supercooled liquids; Numerical tests for soft-sphere fluids

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Physical Review A, 41(4), p.1990 - 1996, 1990/02

 Times Cited Count:18 Percentile:67.93(Optics)

no abstracts in English

Journal Articles

A Modified hypernetted-chain integral equation for the supercooled liquid of inverse power potentials

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Journal of Non-Crystalline Solids, 117-118, p.92 - 95, 1990/00

 Times Cited Count:5 Percentile:43.26(Materials Science, Ceramics)

no abstracts in English

Journal Articles

New empirical bridge functions for integral equation; Application to the binary supercooled liquids of the twelfth inverse power potential

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Proc. of the Yamada Conf. XXIV on Strongly Coupled Plasma Physics, p.683 - 686, 1990/00

no abstracts in English

JAEA Reports

Journal Articles

Phenomenological theory of an isomorphous transition in polar crystals; Application to the II-III transition in ferroelectric Ca$$_{2}$$Pb(C$$_{2}$$H$$_{5}$$COO)$$_{6}$$

Journal of the Physical Society of Japan, 40(2), p.483 - 489, 1976/02

 Times Cited Count:23

no abstracts in English

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