Surface morphology of naphtacene single crystals grown by the physical vapor transport technique

Jo, Sadaharu*; Suzuki, Seiya   ; Yoshimura, Masamichi*

The surface morphology of naphtacene single crystals grown by the physical vapor transport technique was investigated by atomic force microscopy and white-beam X-ray topography. Locally, two types of line pattern were observed on the basal (001) plane along the [110] and [010] directions, and analyzed from crystallographic viewpoints. Such line patterns are considered in relation to crystallographic periodicities, dislocation lines, and slip-plane phenomena.