Negative evidence for a proton-tunneling mechanism in the phase transition of KH2PO4-type crystals.

Ichikawa, Mizuhiko; Motida, Kiyosi; Yamada, Noboru

Physical Review. B, 1987, 36(1), 874-876

Permalink : https://hdl.handle.net/2115/14410

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アクセス権	open access
URI	https://hdl.handle.net/2115/14410
タイトル	Negative evidence for a proton-tunneling mechanism in the phase transition of KH2PO4-type crystals.
著者	Ichikawa, Mizuhiko ; Motida, Kiyosi ; Yamada, Noboru
著者名 Ichikawa, Mizuhiko
著者名 Motida, Kiyosi
著者名 Yamada, Noboru
言語	英語
発行日	1987-07-01
出版者	American Physical Society
収録物名	Physical Review. B
巻(号)	36(1)
ページ	874-876
抄録	We have found a linear relation between the transition temperature T sub c (in K) and the hydrogen-bond length R (in Å) for tetragonal KH2PO4-type crystals, Tc=2290(R-2.428), irrespective of whether the crystals are deuterated or undeuterated; this finding supplies negative evidence for the proton-tunneling mechanism in the phase transition. We deduce from this relation that the isotope effect in the initial pressure derivative of Tc, dTc/dp, reflects not the isotope effect in dTc/dR, so far regarded as supporting evidence of proton tunneling, but that of dR/dp. Some R and dR/dp values at Tc are predicted.
資源タイプ	学術雑誌論文
出版タイプ	Version of Record
権利情報	©1987 The American Physical Society
PISSN	1098-0121
EISSN	1550-235X
関連情報	PMID 9942139