DIFFUSION-LIKE MOTION OF THE MODULATION WAVE IN STRUCTURALLY INCOMMENSURATE SYSTEMS - A NQR STUDY

被引：23

作者：

PAPAVASSILIOU, G ^{[1
]}

LEVENTIS, A ^{[1
]}

MILIA, F ^{[1
]}

DOLINSEK, J ^{[1
]}

机构：

[1] UNIV LJUBLJANA,JOZEF STEFAN INST,LJUBLJANA 61111,SLOVENIA

来源：

PHYSICAL REVIEW LETTERS | 1995年 / 74卷 / 12期

关键词：

D O I：

10.1103/PhysRevLett.74.2387

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

35Cl NQR measurements of the spin-echo decay in pure Rb2ZnCl4 exhibit an exponential t3 diffusional time dependence, which is the first clear evidence for the existence of slow random-walk-type motion of the incommensurate modulation wave close to the transition temperature TI. This phenomenon can be described by an effective diffusion constant Df in a reduced real space, which is settled as the projection of the direct space onto 14 the period length of the modulation wave. The onset of the incommensurate phase is accompanied by nonzero Df values, which rapidly decrease on going away from TI. © 1995 The American Physical Society.

引用

页码：2387 / 2390

页数：4

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