title: Accessing surface Brillouin zone and band structure of picene single crystals.
abstract: We have experimentally revealed the band structure and the surface Brillouin zone of insulating picene single crystals (SCs), the mother organic system for a recently discovered aromatic superconductor, with ultraviolet photoelectron spectroscopy (UPS) and low-energy electron diffraction with a laser for photoconduction. A hole effective mass of 2.24m(0) and the hole mobility μ(h)≥9.0 cm(2)/V s (298 K) were deduced in the Γ-Y direction. We have further shown that some picene SCs did not show charging during UPS even without the laser, which indicates that pristine UPS works for high-quality organic SCs.
authors.affiliation: Graduate School of Advanced Integration Science, Chiba University, Chiba 263-8522, Japan. xin@restaff.chiba-u.jp
authors.forename: Qian
authors.initials: Q
authors.lastname: Xin
authors.forename: Steffen
authors.initials: S
authors.lastname: Duhm
authors.forename: Fabio
authors.initials: F
authors.lastname: Bussolotti
authors.forename: Kouki
authors.initials: K
authors.lastname: Akaike
authors.forename: Yoshihiro
authors.initials: Y
authors.lastname: Kubozono
authors.forename: Hideo
authors.initials: H
authors.lastname: Aoki
authors.forename: Taichi
authors.initials: T
authors.lastname: Kosugi
authors.forename: Satoshi
authors.initials: S
authors.lastname: Kera
authors.forename: Nobuo
authors.initials: N
authors.lastname: Ueno