Surface melting of electronic order.
- Materials Science Division
We report temperature-dependent surface x-ray scattering studies of the orbital ordered surface in La{sub 0.5}Sr{sub 1.5}MnO{sub 4}. 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.
- Research Organization:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC); Ministry of Education, Culture, Sports Science and Technology of Japan
- DOE Contract Number:
- DE-AC02-06CH11357
- OSTI ID:
- 1028606
- Report Number(s):
- ANL/MSD/JA-70299; TRN: US201122%%764
- Journal Information:
- Physical Review. B. Condensed Matter and Materials Physics, Vol. 84, Issue 16; ISSN 1098-0121
- Country of Publication:
- United States
- Language:
- ENGLISH
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