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@ARTICLE{Campbell:29882,
author = {Campbell, B. J. and Sinha, S. K. and Osborn, R. and
Rosenkranz, S. and Mitchell, J. F. and Argyriou, D. N. and
Vasiliu-Doloc, L. and Seeck, O. and Lynn, J. W.},
title = {{P}olaronic orbital polarization in a layered colossal
magnetoresistive manganite},
journal = {Physical review / B},
volume = {67},
number = {2},
issn = {0163-1829},
address = {College Park, Md.},
publisher = {APS},
reportid = {PreJuSER-29882},
pages = {020409},
year = {2003},
note = {Record converted from VDB: 12.11.2012},
abstract = {The striking anisotropy observed in Huang scattering
distributions near the intense Bragg reflections of
La1.2Sr1.8Mn2O7 is shown to be the result of orbitally
polarized polarons in the paramagnetic insulating state
above T-C. X-ray single-crystal diffuse scattering patterns
from this bilayered colossal magnetoresistive manganite are
calculated in terms of the polaronic local structure and
compared with experimental measurements. At 300 K, the
polaronic e(g) electrons occupy "out-of-plane" (i.e.,
3z(2)-r(2)) orbitals, leading to MnO6 octahedra that are
Jahn-Teller elongated along the c axis, perpendicular to the
perovskite layers. Between 300 K and T-C, however, the
"orbital polarization" is shown to shift into the a-b plane
(i.e., 3x(2)-r(2) and 3y(2)-r(2) orbitals), allowing the
formation of nanoscale polaron correlations above T-C.},
keywords = {J (WoSType)},
cin = {IFF-STM},
ddc = {530},
cid = {I:(DE-Juel1)VDB33},
pnm = {Kondensierte Materie},
pid = {G:(DE-Juel1)FUEK242},
shelfmark = {Physics, Condensed Matter},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000180918900011},
doi = {10.1103/PhysRevB.67.020409},
url = {https://juser.fz-juelich.de/record/29882},
}