期刊
PHYSICAL REVIEW LETTERS
卷 120, 期 19, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.120.197201
关键词
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资金
- U.S. DOE [DE-AC02-06CH11357]
- UIC
- ANL (by the U.S. DOE Office of Science program)
- National Institute of Standards and Technology (NIST)
- DOE BES [DEFG02-07ER46351]
We report ordering of the cobalt electron configuration in ferromagnetic strained epitaxial LaCoO3. Specifically, the presence of charge order is demonstrated from distinct features of the resonant cobalt contribution to superstructure reflections. Density functional theory calculations show that the observed order is consistent with the spin-state periodicity predicted to give rise to ferromagnetism in LaCoO3. Through the modification of symmetry by strain, concurrent frozen charge and spin-state order are stabilized, giving rise to long-range magnetic order.
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