title: Glass-like recovery of antiferromagnetic spin ordering in a photo-excited manganite Pr₀.₇Ca₀.₃MnO₃.
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 undertsanding 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 Pr₀.₇Ca₀.₃MnO₃ 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.
authors: 1] Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA [2] State Key Laboratory of Low Dimensional Quantum Physics and Department of Physics, Tsinghua University, Beijing 100084, China [3] Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.
authors: S Y
authors: SY
authors: Zhou
authors: Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.
authors: M C
authors: MC
authors: Langner
authors: 1] Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA [2] Department of Applied Science, University of California, Davis, CA 95616, USA.
authors: Y
authors: Y
authors: Zhu
authors: Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.
authors: Y-D
authors: YD
authors: Chuang
authors: Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.
authors: M
authors: M
authors: Rini
authors: Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.
authors: T E
authors: TE
authors: Glover
authors: Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.
authors: M P
authors: MP
authors: Hertlein
authors: Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.
authors: A G Cruz
authors: AG
authors: Gonzalez
authors: 1] Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA [2] National Center for Physics, Islamabad, Pakistan.
authors: N
authors: N
authors: Tahir
authors: Nanoelectronics Research Institute, National Institute of Advanced Industrial Science and Technology (AIST) Tsukuba Central 4, 1-1-1 Higashi Tsukuba 305-8562, Japan.
authors: Y
authors: Y
authors: Tomioka
authors: 1] Department of Applied Physics, University of Tokyo, Bunkyo-ku, Tokyo 113-8656, Japan [2] Cross-Correlated Materials Research Group (CMRG) and Correlated Electron Research Group (CERG), Advanced Science Institute, RIKEN, Wako 351-0198, Japan.
authors: Y
authors: Y
authors: Tokura
authors: Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.
authors: Z
authors: Z
authors: Hussain
authors: Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.
authors: R W
authors: RW
authors: Schoenlein