Cooperative elastic switching vs. laser heating in [Fe(phen)2(NCS)2] spin-crossover crystals excited by a laser pulse.
Cooperative elastic switching vs. laser heating in [Fe(phen)2(NCS)2] spin-crossover crystals excited by a laser pulse.
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在[Fe（PEN）2（NCS）2]中通过激光脉冲激发的自旋横断晶体中的合作弹性切换与激光加热。
DOI：
10.1039/c6ce00659k
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发表时间：
2016-10-14
期刊：
影响因子：
3.1
通讯作者：
Collet E
中科院分区：
文献类型：
--
作者：
Bertoni R;Lorenc M;Graber T;Henning R;Moffat K;Létard JF;Collet E
自旋交叉晶体对飞秒光激发表现出多阶响应。局部分子从低自旋态到高自旋态的光转换发生在亚皮秒时间尺度上。其次是由于弹性（ns）和热（μs）效应而产生的额外转换。在本文讨论的[Fe(phen)2(NCS)2]晶体中，热开关可以不引人注目地用于研究协同弹性开关。我们通过晶体中分子之间的弹性耦合证明了晶格膨胀引起的合作转换，其中每个光子转换多达3个分子。
Spin-crossover crystals show multi-step responses to femtosecond light excitation. The local molecular photo-switching from low to high spin states occurs on sub-picosecond timescale. It is followed by additional conversion due to elastic (ns) and thermal (μs) effects. In [Fe(phen)2(NCS)2] crystals discussed herein, the thermal switching can be made unobtrusive for the investigation of cooperative elastic switching. We evidence a cooperative transformation induced by lattice expansion through elastic coupling between molecules in the crystal, where up to 3 molecules are transformed per photon.