Publication Type
Journal
Journal Name
Physical Review Letters
Publication Date
Volume
99
Issue
25
Abstract
The temperature dependence of charge order in Fe$_2$OBO$_3$ was
investigated by resistivity and differential scanning calorimetry
measurements, M\"ossbauer spectroscopy, and synchrotron x-ray
scattering, revealing an intermediate phase between room temperature
and $340\,{\rm K}$, characterized by coexisting mobile and immobile
carriers, and by incommensurate superstructure modulations with
temperature-dependent propagation vector $(\frac{1}{2},0,\tau)$. The
incommensurate modulations arise from specific anti-phase boundaries
with low energy cost due to geometrical charge frustration.
