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Title: d-d excitations in bilayer manganites probed by resonant inelastic x-ray scattering.

Abstract

We report a high-resolution resonant inelastic x-ray scattering investigation of the bilayer manganites La{sub 2-2x}Sr{sub 1+2x}Mn{sub 2}O{sub 7} with x=0.36 and 0.5. The momentum dependence along the crystallographic (110) direction for energy losses 1 eV {le} {Delta}E {le} 15 eV has been measured in detail with the data analysis focusing on the energy-loss region 1 eV {le} {Delta}E {le} 5 eV, which includes a strong peak located at {Delta}E {approx} 2 eV. We observe a clear dispersion of up to 0.5 eV in the measured q range, which is direct evidence of the nonlocal character of this excitation. Further, we found that the intensity in this low-energy region strongly depends on both the reduced wave vector q=(h,h,0), h=0.1-0.5, and temperature, i.e., different ordered phases. Results can be explained via an intersite d-d charge-transfer excitation, proposed for pseudocubic manganites, where the hopping rate is strongly increased (decreased) by ferromagnetic (antiferromagnetic) alignment of neighboring in-plane Mn ion core spins.

Authors:
; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
989076
Report Number(s):
ANL/MSD/JA-66970
Journal ID: 1098-0121; TRN: US201019%%270
DOE Contract Number:  
DE-AC02-06CH11357
Resource Type:
Journal Article
Journal Name:
Phys. Rev. B
Additional Journal Information:
Journal Volume: 82; Journal Issue: 2010
Country of Publication:
United States
Language:
ENGLISH
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ALIGNMENT; DATA ANALYSIS; ENERGY LOSSES; EXCITATION; FOCUSING; SCATTERING; VECTORS

Citation Formats

Weber, F, Rosenkranz, S, Castellan, J -P, Osborn, R, Mitchell, J F, Zheng, H, Case, D, Kim, J H, and Gog, T. d-d excitations in bilayer manganites probed by resonant inelastic x-ray scattering.. United States: N. p., 2010. Web. doi:10.1103/PhysRevB.82.085105.
Weber, F, Rosenkranz, S, Castellan, J -P, Osborn, R, Mitchell, J F, Zheng, H, Case, D, Kim, J H, & Gog, T. d-d excitations in bilayer manganites probed by resonant inelastic x-ray scattering.. United States. https://doi.org/10.1103/PhysRevB.82.085105
Weber, F, Rosenkranz, S, Castellan, J -P, Osborn, R, Mitchell, J F, Zheng, H, Case, D, Kim, J H, and Gog, T. Fri . "d-d excitations in bilayer manganites probed by resonant inelastic x-ray scattering.". United States. https://doi.org/10.1103/PhysRevB.82.085105.
@article{osti_989076,
title = {d-d excitations in bilayer manganites probed by resonant inelastic x-ray scattering.},
author = {Weber, F and Rosenkranz, S and Castellan, J -P and Osborn, R and Mitchell, J F and Zheng, H and Case, D and Kim, J H and Gog, T},
abstractNote = {We report a high-resolution resonant inelastic x-ray scattering investigation of the bilayer manganites La{sub 2-2x}Sr{sub 1+2x}Mn{sub 2}O{sub 7} with x=0.36 and 0.5. The momentum dependence along the crystallographic (110) direction for energy losses 1 eV {le} {Delta}E {le} 15 eV has been measured in detail with the data analysis focusing on the energy-loss region 1 eV {le} {Delta}E {le} 5 eV, which includes a strong peak located at {Delta}E {approx} 2 eV. We observe a clear dispersion of up to 0.5 eV in the measured q range, which is direct evidence of the nonlocal character of this excitation. Further, we found that the intensity in this low-energy region strongly depends on both the reduced wave vector q=(h,h,0), h=0.1-0.5, and temperature, i.e., different ordered phases. Results can be explained via an intersite d-d charge-transfer excitation, proposed for pseudocubic manganites, where the hopping rate is strongly increased (decreased) by ferromagnetic (antiferromagnetic) alignment of neighboring in-plane Mn ion core spins.},
doi = {10.1103/PhysRevB.82.085105},
url = {https://www.osti.gov/biblio/989076}, journal = {Phys. Rev. B},
number = 2010,
volume = 82,
place = {United States},
year = {2010},
month = {1}
}