Cover Picture: Nanoscale retention‐loss dynamics of polycrystalline PbTiO₃ nanotubes (Phys. Status Solidi RRL 8/2011)

One-dimensional ferroelectric nanomaterials have attracted attention due to excellent properties compared to their bulk thin film counter parts. In the Letter featured on the front cover of this issue, Hyunwoo Choi et al. (pp. 289–291) have observed the nanoscale retention loss dynamics of polycrystalline PbTiO3 nanotubes. The cover image shows the changes of size of the nanodot domains written on the PbTiO3 nanotube. The authors found that the retention loss of the nanodot domains on the nanotube showed stretched exponential relaxation behaviors, which are similar to those of thin films (stretched exponential factor is less than one).