| Reentrant Orbital Order and the True Ground State of LaSr2Mn2O7 (2007) | |||||||||
Abstract | |||||||||
| Contrary to conventional wisdom, our purified La2-2xSr1+2xMn2O7 crystals exhibit CE-type orbital and charge order as the low-temperature ground state for a hole doping level h = 0.5. For small deviations from h = 0.5, the high temperature CE phase is replaced at low temperatures by an A-type antiferromagnet without coexistence. Larger deviations result in a lack of CE order at any temperature. Thus, small inhomogeneities in cation or oxygen composition could explain why others commonly see this reentrance with coexistence.. Comment: 4 pages, RevTex4 | |||||||||
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