DYNAMICS OF A PHOTOINDUCED PHASE-TRANSITION IN POLYDIACETYLENE CRYSTALS

被引:52
作者
KOSHIHARA, S
TOKURA, Y
TAKEDA, K
KODA, T
机构
[1] UNIV TOKYO,DEPT PHYS,TOKYO 113,JAPAN
[2] JAPAN SYNTH RUBBER CO LTD,TSUKUBA RES LAB,TSUKUBA,IBARAKI 305,JAPAN
[3] UNIV TOKYO,DEPT APPL PHYS,TOKYO 113,JAPAN
来源
PHYSICAL REVIEW B | 1995年 / 52卷 / 09期
关键词
D O I
10.1103/PhysRevB.52.6265
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The dynamical process of the photoinduced phase transition in polydiacetylene (PDA) single crystals has been investigated by time-resolved spectroscopy with varying temperature, excitation photon energy, and intensity. The photoinduced phase transition can be driven bidirectionally between the two (A and B) phases by dichromatic irradiation of a laser pulse, when the temperature of the PDA crystal is kept around the phase transition temperature (T-c). It was found that primary process of the photoinduced phase transition is mostly completed within 50 ns. In addition, occurrence of a transient domain injection has been confirmed at temperatures far below and above T-c. Together with the time-resolved measurement of photocurrent, we have found a close correlation between the photocurrent intensity and the phase conversion efficiency. This suggests that the domain walls separating the A and B phases can carry the charge.
引用
收藏
页码:6265 / 6272
页数:8
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