Theory of Phase Transition in Solid Ortho-Hydrogen. I
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概要
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The orientational phase transition in solid ortho-hydrogen of a face-centred cubic Pa3 structure is theoretically investigated. The method of symmetry-breaking potential is applied with the use of the inverse temperature expansion. The truncated electric quadrupole-quadrupole interaction is taken in the Hamiltonian and the sum of the pair interaction is extended to the fifth neighbour pairs. The expression of the free energy is derived up to third order of the inverse temperature. The rotation-phonon coupling is also taken into account. It is found that a first order phase transition occurs so long as the rotation-phonon coupling constant exceeds a certain critical value.
- 理論物理学刊行会の論文
- 1975-07-25
著者
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Nakano Huzio
Department Of Applied Physics Faculty Of Engineering Nagoya University
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Homma Sigeo
Department Of Chemistry Faculty Of Science Kyoto University
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HOMMA Shigeo
Department of Applied Physics, Faculty of Engineering Nagoya University
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