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Correlations between electronic order and structural distortions and their ultrafast dynamics in the single-layer manganite P r0.5 C a1.5Mn O4
Porer M.a, Rettig L.a, Bothschafter E.M.a, Esposito V.a, Versteeg R.B.b, Van Loosdrecht P.H.M.b, Savoini M.a,c, Rittmann J.a, Kubli M.c, Lantz G.c, Schumann O.J.b, Nugroho A.A.d, Braden M.b, Ingold G.a, Johnson S.L.c, Beaud P.a, Staub U.a
a Swiss Light Source, Paul Scherrer Institute, Villigen PSI, 5232, Switzerland
b Institute of Physics II, University of Cologne, Cologne, 50937, Germany
c Institute for Quantum Electronics, Eth Zürich, Zürich, 8093, Switzerland
d Faculty of Mathematics and Natural Science, Institut Teknologi Bandung, Indonesia
[vc_row][vc_column][vc_row_inner][vc_column_inner][vc_separator css=”.vc_custom_1624529070653{padding-top: 30px !important;padding-bottom: 30px !important;}”][/vc_column_inner][/vc_row_inner][vc_row_inner layout=”boxed”][vc_column_inner width=”3/4″ css=”.vc_custom_1624695412187{border-right-width: 1px !important;border-right-color: #dddddd !important;border-right-style: solid !important;border-radius: 1px !important;}”][vc_empty_space][megatron_heading title=”Abstract” size=”size-sm” text_align=”text-left”][vc_column_text]© 2020 American Physical Society.Time-resolved X-ray diffraction experiments on the half-doped single-layered manganite Pr0.5Ca1.5MnO4 are used to monitor the ultrafast photoinduced dynamics of the structural distortion associated with the charge and orbital ordering (CO/OO). As in the nonlayered three-dimensional counterpart, the ordered phase melts in less than 100 fs after 800-nm photoexcitation and subsequently partially recovers due to thermal equilibration of electronic and vibrational systems. Photoexciting Pr0.5Ca1.5MnO4 below the transition temperature of a second structural phase transition that occurs around 146 K (deep inside the CO/OO phase) releases this structural transition, but progresses on a much slower timescale. This additional reduction of crystal symmetry, which we ascribe to a further tilt of the oxygen octahedra, can thus be considered to be only weakly coupled to CO/OO. Furthermore, static hard-X-ray and resonant soft-X-ray diffraction at the MnL2,3 edges experiments identify correlations between structural distortions and electronic order in thermal equilibrium.[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Author keywords” size=”size-sm” text_align=”text-left”][vc_column_text]Charge and orbital ordering,Photoinduced dynamics,Structural distortions,Structural phase transition,Structural transitions,Thermal equilibrations,Thermal equilibriums,Time resolved x-ray diffractions[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Indexed keywords” size=”size-sm” text_align=”text-left”][vc_column_text][/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Funding details” size=”size-sm” text_align=”text-left”][vc_column_text]We thank D. Meister and A. Oggenfuss for technical support at the X04SA and FEMTO beamlines, and D. Grolimund for supporting the time-resolved “femtoslicing” experiments at the X05SA beamline. We further acknowledge help by E. Pomjakushina and S. Stutz with preparation of the sample surface. The research leading to these results has received funding from the Swiss National Science Foundation and its National Center of Competence in Research, Molecular Ultrafast Science and Technology (NCCR MUST) and Materials’ Revolution: Computational Design and Discovery of Novel Materials (NCCR MARVEL). L.R. acknowledges funding from the DFG in the Emmy Noether program under Grant No. RE 3977/1. E.M.B. acknowledges funding from the European Community’s Seventh Framework Programme (FP7/2007-2013) under Grant Agreement No. 290605 (PSI-FELLOW/COFUND). We acknowledge financial support of the Deutsche Forschungsgemeinschaft (DFG) through CRC 1238 (Project No. 277146847, subprojects A02, B04, and B05).[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”DOI” size=”size-sm” text_align=”text-left”][vc_column_text]https://doi.org/10.1103/PhysRevB.101.075119[/vc_column_text][/vc_column_inner][vc_column_inner width=”1/4″][vc_column_text]Widget Plumx[/vc_column_text][/vc_column_inner][/vc_row_inner][/vc_column][/vc_row][vc_row][vc_column][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][/vc_column][/vc_row]