TY - JOUR
T1 - Altered Sr environment
AU - Haskel, D.
AU - Stern, E.
AU - Hinks, D.
AU - Mitchell, A.
AU - Jorgensen, J.
PY - 1997
Y1 - 1997
N2 - The atomic arrangement about the Sr atoms in (Formula presented) was investigated by Sr (Formula presented)-edge polarized x-ray-absorption fine structure on oriented powder with (Formula presented)=0.075 and 0.1 at (Formula presented) K. Our results confirm that Sr resides at the La lattice site but we discovered it induces major structural distortions in neighboring oxygen atoms. In particular, our best fits indicate that the O(2) apical oxygen to Sr is split into two sites separated by 0.30(4) Å, providing evidence for a strong lattice-hole interaction, i.e., a polaron, which may be involved in the pairing mechanism of these cuprates.
AB - The atomic arrangement about the Sr atoms in (Formula presented) was investigated by Sr (Formula presented)-edge polarized x-ray-absorption fine structure on oriented powder with (Formula presented)=0.075 and 0.1 at (Formula presented) K. Our results confirm that Sr resides at the La lattice site but we discovered it induces major structural distortions in neighboring oxygen atoms. In particular, our best fits indicate that the O(2) apical oxygen to Sr is split into two sites separated by 0.30(4) Å, providing evidence for a strong lattice-hole interaction, i.e., a polaron, which may be involved in the pairing mechanism of these cuprates.
UR - http://www.scopus.com/inward/record.url?scp=0001221370&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.56.R521
DO - 10.1103/PhysRevB.56.R521
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AN - SCOPUS:0001221370
SN - 1098-0121
VL - 56
SP - R521-R524
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 2
ER -