Abstract
X-ray and neutron scattering measurements directly demonstrate the existence of polarons in the paramagnetic phase of optimally doped colossal magnetoresistive oxides. The polarons exhibit short-range correlations that grow with decreasing temperature, but disappear abruptly at the ferromagnetic transition because of the sudden charge delocalization. The “melting” of the charge ordering as we cool through occurs with the collapse of the quasistatic polaron scattering, and provides important new insights into the relation of polarons to colossal magnetoresistance.
- Received 15 July 1999
DOI:https://doi.org/10.1103/PhysRevLett.83.4393
©1999 American Physical Society