Glass-like recovery of antiferromagnetic spin ordering and dimensional crossover in a photo-excited manganite Pr$_{0.7}$Ca$_{0.3}$MnO$_3$

S. Y. Zhou; M. C. Langner; Y. Zhu; Y. -D. Chuang; M. Rini; T. E. Glover; M. P. Hertlein; A. G. Cruz Gonzalez; N. Tahir; Y. Tomioka; Y. Tokura; Z. Hussain; R. W. Schoenlein

arXiv · 1209.3452

Glass-like recovery of antiferromagnetic spin ordering and dimensional crossover in a photo-excited manganite Pr$_{0.7}$Ca$_{0.3}$MnO$_3$

S. Y. Zhou·M. C. Langner·Y. Zhu·Y. -D. Chuang·M. Rini·T. E. Glover·M. P. Hertlein·A. G. Cruz Gonzalez·N. Tahir·Y. Tomioka·Y. Tokura·Z. Hussain·R. W. Schoenlein

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Abstract

Electronic orderings of charges, orbitals and spins are observed in many strongly correlated electron materials, and revealing their dynamics is a critical step toward understanding the underlying physics of important emergent phenomena. Here we use time-resolved resonant soft x-ray scattering spectroscopy to probe the dynamics of antiferromagnetic spin ordering in the manganite Pr$_{0.7}$Ca$_{0.3}$MnO$_3$ following ultrafast photo-exitation. Our studies reveal a glass-like recovery of the spin ordering and a crossover in the dimensionality of the restoring interaction from quasi-1D at low pump fluence to 3D at high pump fluence. This behavior arises from the metastable state created by photo-excitation, a state characterized by spin disordered metallic droplets within the larger charge- and spin-ordered insulating domains. Comparison with time-resolved resistivity measurements suggests that the collapse of spin ordering is correlated with the insulator-to-metal transition, but the recovery of the insulating phase does not depend on the re-establishment of the spin ordering.

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S. Y. Zhou, M. C. Langner, Y. Zhu, Y. -D. Chuang, M. Rini, T. E. Glover, M. P. Hertlein, A. G. Cruz Gonzalez, N. Tahir, Y. Tomioka, Y. Tokura, Z. Hussain, R. W. Schoenlein. 2012-09-16. Glass-like recovery of antiferromagnetic spin ordering and dimensional crossover in a photo-excited manganite Pr$_{0.7}$Ca$_{0.3}$MnO$_3$. https://arxiv.org/abs/1209.3452

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