Photoinduced charge and spin dynamics in strongly correlated electron systems
Photoinduced charge and spin dynamics in strongly correlated electron systems
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DOI：
10.1143/jpsj.76.083703
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发表时间：
2006-12
期刊：
影响因子：
--
通讯作者：
H. Matsueda;S. Ishihara
中科院分区：
文献类型：
--
作者：
H. Matsueda;S. Ishihara
基于钙钛矿锰氧化物的光致相变，我们研究了光辐照引起的电荷和自旋动力学。用密度矩阵重整化群方法计算了扩展双交换模型的瞬态光吸收谱。电荷有序绝缘体（COI）在光照射后立即变为金属状态，并且金属状态倾向于恢复初始COI。这种恢复是伴随着抑制的反铁磁相关的COI和显着附近的相界在基态。我们讨论了最近的泵浦探测反射和磁光克尔光谱数据的影响。
Motivated by the photoinduced phase transition in perovskite manganites, we examine charge and spin dynamics induced by photoirradiation. We calculate the transient optical absorption spectra of the extended double-exchange model by the density matrix renormalization group method. A charge-ordered insulator (COI) becomes metallic just after photoirradiation, and the metallic state tends to recover the initial COI. This recovery is accompanied by the suppression of an antiferromagnetic correlation in the COI and is remarkable near a phase boundary in the ground state. We discuss the implications of the recent pump-probe reflection and magneto-optical Kerr spectroscopy data.