A Two Doublet Model for the Phase Transition in KDP
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概要
- 論文の詳細を見る
By assuming that each of the ground and lowest excited levels of the proton(deuteron) on the hydrogen bond in KDP composes a doublet, the pseudospinhamiltonian for the proton (deuteron) system with tunneling motion, which isassumed to occur in the doublet of excited level, is presented to investigate theferroelectric phase transition in KDP. On the basis of this hamiltonian, the firstand second order transitions, which depend on the pressut'e, and therefore theexistence of a tricritical point are explained on the basis of a mean field approxima-tion, including the isotope effect in the transition. These are discussed in terms ofthe energy separation between the two doublets, the tunneling frequency at theexcited doublet and the parameters of coupling between protons (deuterons) ondifferent bonds.
- 社団法人日本物理学会の論文
- 1978-02-15
著者
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Nakano Huzio
Department Of Applied Physics Faculty Of Engineering Nagoya University
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Ohtomi Ken-ichi
Department Of Applied Physics Faculty Of Engineering Nagoya University
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