Enhancement of (^<14>N) Quadrupolar Relaxation in the One Dimensional Conductor K_2Pt (CN)_4Br_<0.3>3.2H_2O Due to Lattice Fluctuations above the Peierls Transition

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概要

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• The spin-lattice relaxation T, of "N(7= l) nuclei in a single crystal of the mixed-valency platino-cyanate K.Pt(CN).Br..,3.2H.O(KCP) quasi-one dimensional conduc-for has been measured in the temperature domain from room temperature down tothe 3-D Peierls ordering below 120 K. A rapid increase of the quadrupolar relaxa-lion is observed below 220 K which follows the power law 1 / T.cxr "' where r(T - T.) / T.. This behaviour is explained in terms of the critical slowing down of Rat-tice fluctuations with a Landau-Ginzburg theory. The square root critical divergenceof T ' is the signature of the harmonic regime for the order parameter fluctuations.The enhancement of T. ' and the very wide 3-D critical width can be explained by thestrong anisotropy of correlation lengths in this Q-1-D condtmctor.

• 社団法人日本物理学会の論文
• 1987-11-15

著者

• Bourbonnais C

  Laboratoire De Physique Des Solides Universite De Paris-sud

• Soda G

  Laboratoire De Physique Des Solides Universite De Paris-sud

• Soda G.

  Laboratoire de Physique des Solides Universite de Paris-Sud

• Bourbonnais C.

  Laboratoire de Physique des Solides Universite de Paris-Sud

• Jerome D.

  Laboratoire de Physique des Solides Universite de Paris-Sud

関連論文

• The Equivalence of the Hubbard-Stratonovich and the Takano-Langer-Gaudin Transiformations for a One-Dimensional Peierls System
• Enhancement of (^N) Quadrupolar Relaxation in the One Dimensional Conductor K_2Pt (CN)_4Br_3.2H_2O Due to Lattice Fluctuations above the Peierls Transition

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