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 laser for photoconduction. A hole effective mass of 2.24 m_0 and the hole mobility mu_h >= 9.0 cm^2/Vs (298 K) were deduced in Gamma-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.
@article{arxiv.1204.4178,
title = {Accessing surface Brillouin zone and band structure of picene single crystals},
author = {Qian Xin and Steffen Duhm and Fabio Bussolotti and Kouki Akaike and Yoshihiro Kubozono and Hideo Aoki and Taichi Kosugi and Satoshi Kera and Nobuo Ueno},
journal= {arXiv preprint arXiv:1204.4178},
year = {2015}
}
Comments
5 pages, 4 figures, Phys. Rev. Lett. 108, 226401 (2012)