TY - JOUR
T1 - Surface melting of electronic order in La0.5Sr 1.5MnO4
AU - Wilkins, S. B.
AU - Liu, X.
AU - Wakabayashi, Y.
AU - Kim, J. W.
AU - Ryan, P. J.
AU - Zheng, H.
AU - Mitchell, J. F.
AU - Hill, J. P.
PY - 2011/10/7
Y1 - 2011/10/7
N2 - We report temperature-dependent surface x-ray scattering studies of the orbital ordered surface in La0.5Sr1.5MnO4. We find that as the bulk ordering temperature is approached from below the thickness of the interface between the electronically ordered and electronically disordered regions at the surface grows, though the bulk correlation length remains unchanged. Close to the transition, the surface is so rough that there is no well-defined electronic surface, despite the presence of bulk electronic order. That is, the electronic ordering at the surface has melted. Above the bulk transition, long-range ordering in the bulk is destroyed but finite-sized isotropic fluctuations persist, with a correlation length roughly equal to that of the low-temperature in-plane surface correlation length.
AB - We report temperature-dependent surface x-ray scattering studies of the orbital ordered surface in La0.5Sr1.5MnO4. We find that as the bulk ordering temperature is approached from below the thickness of the interface between the electronically ordered and electronically disordered regions at the surface grows, though the bulk correlation length remains unchanged. Close to the transition, the surface is so rough that there is no well-defined electronic surface, despite the presence of bulk electronic order. That is, the electronic ordering at the surface has melted. Above the bulk transition, long-range ordering in the bulk is destroyed but finite-sized isotropic fluctuations persist, with a correlation length roughly equal to that of the low-temperature in-plane surface correlation length.
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U2 - 10.1103/PhysRevB.84.165103
DO - 10.1103/PhysRevB.84.165103
M3 - Article
AN - SCOPUS:80455178754
VL - 84
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
SN - 0163-1829
IS - 16
M1 - 165103
ER -