Session K1: Poster Session II (2:00pm - 5:00pm)
2:00 PM–2:00 PM, Tuesday, March 22, 2011
Room: Hall D
Sponsoring Unit:
APS
Abstract ID: BAPS.2011.MAR.K1.209
Abstract: K1.00209 : Oxygen staging in phase separated La$_{2-x}$Sr$_{x}$CuO$_{4+y}$
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Abstract 
Authors:
Hashini Mohottala
(University of Hartford, 200, Bloomfield Ave. West-Hartford, CT-06117)
Linda Udby
(e-Science and Nanoscience Centres, Niels Bohr Institute, Universistetsparken 5, 2100)
S. Emery
(University of Connecticut, 2152, Hillside road, Storrs)
B.O. Wells
(University of Connecticut, 2152, Hillside road, Storrs)
J.I. Budnick
(University of Connecticut, 2152, Hillside road, Storrs)
Christof Nidermayer
(ETHZ \& PSI, CH-5232 Villigen PSI, Switzerland)
Kim Lefmann
(e-Science and Nanoscience Centres, Niels Bohr Institute, Universistetsparken 5, 2100)
N.H. Anderson
(Ris DTU, Frederiksborgvej 399, 4000 Roskilde, Denmark)
F.C. Chou
(Center for Condensed Matter Sciences, National Taiwan University,Taipei 10617, Taiwan)
We studied oxygen staging in a series of La$_{2-x}$Sr$_{x}$CuO$_{4}$ (LSCO) samples using neutron scattering. The samples were oxidized using electrochemistry. Electronic phase separation was previously reported in the oxygen rich LSCO system with two stable phases identified as optimally doped superconducting phase and a magnetic phase (1/8th like) with the same ordering temperatures at 40 K . Our present studies show staging in this system. Although staging was observed and extensively studied in the samples with no Sr, it has not been reported or systematically studied in the systems with both Sr and oxygen. We do find staging in the oxygenated LSCO system, but the staging peaks evolve as Sr concentration increases and excess oxygen concentration decreases.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2011.MAR.K1.209