Laser-Induced Charge-Density-Wave Transient Depinning in Chromium

被引：23

作者：

Jacques, V. L. R. ^{[1
]}

Laulhe, C. ^{[2
,3
]}

Moisan, N. ^{[1
]}

Ravy, S. ^{[1
]}

Le Bolloc'h, D. ^{[1
]}

机构：

[1] Univ Paris Saclay, Univ Paris 11, Phys Solides Lab, CNRS, F-91405 Orsay, France

[2] Synchrotron Soleil, BP 48, F-91192 Gif Sur Yvette, France

[3] Univ Paris Saclay, Univ Paris 11, F-91405 Orsay, France

来源：

PHYSICAL REVIEW LETTERS | 2016年 / 117卷 / 15期

关键词：

X-RAY; PURE CHROMIUM; DYNAMICS; TRANSITION; ANTIFERROMAGNETISM; TEMPERATURE; STRAIN;

D O I：

10.1103/PhysRevLett.117.156401

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report on time-resolved x-ray diffraction measurements following femtosecond laser excitation in pure bulk chromium. Comparing the evolution of incommensurate charge-density-wave (CDW) and atomic lattice reflections, we show that, a few nanoseconds after laser excitation, the CDW undergoes different structural changes than the atomic lattice. We give evidence for a transient CDW shear strain that breaks the lattice point symmetry. This strain is characteristic of sliding CDWs, as observed in other incommensurate CDW systems, suggesting the laser-induced CDW sliding capability in 3D systems. This first evidence opens perspectives for unconventional laser-assisted transport of correlated charges.

引用

页数：5

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