Single particle and collective excitations in the one-dimensional charge density wave solid K0.3MoO3 probed in real time by femtosecond spectroscopy

被引：227

作者：

Demsar, J

Biljakovic, K

Mihailovic, D

机构：

[1] Jozef Stefan Inst, Dept Solid State Phys, Ljubljana 1001, Slovenia

[2] Inst Phys, HR-10000 Zagreb, Croatia

来源：

PHYSICAL REVIEW LETTERS | 1999年 / 83卷 / 04期

关键词：

D O I：

10.1103/PhysRevLett.83.800

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Ultrafast transient reflectivity changes caused by collective and single particle excitations in the quasi-one-dimensional charge-density wave (CDW) semiconductor K0.3MoO3 are investigated with optical pump-probe spectroscopy. The temperature dependence of nonequilibrium single particle excitations across the CDW gap and their recombination dynamics are reported for the first time. In addition, amplitude mode reflectivity oscillations are observed in real time. A T-dependent overdamped response it; also observed which is attributed to relaxation of the phason mode.

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页码：800 / 803

页数：4

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