Temporally ordered collective creep and dynamic transition in the charge-density-wave conductor NbSe3

被引：42

作者：

Lemay, SG

Thorne, RE

Li, Y

Brock, JD

机构：

[1] Cornell Univ, Atom & Solid State Phys Lab, Ithaca, NY 14853 USA

[2] Cornell Univ, Sch Appl & Engn Phys, Ithaca, NY 14853 USA

来源：

PHYSICAL REVIEW LETTERS | 1999年 / 83卷 / 14期

关键词：

D O I：

10.1103/PhysRevLett.83.2793

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have observed an unusual form of creep at low temperatures in the charge-density-wave (CDW) conductor NbSe3. This creep develops when CDW motion becomes limited by thermally activated phase advance past individual impurities, demonstrating the importance of local pinning and related short-length-scale dynamics. Unlike in vortex lattices, elastic collective dynamics on longer length scales results in temporally ordered motion and a finite threshold field. A first-order dynamic phase transition from deep to high-velocity sliding produces "switching" in the velocity-field characteristic.

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页码：2793 / 2796

页数：4

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