六方茂单晶的表面布里渊区和能带结构
Accessing surface Brillouin zone and band structure of picene single crystals
摘要：
用紫外光电子能谱学（UPS）和低能激光电子衍射光电导方法，对一种新发现的芳香族超导体的母体有机体系--绝缘的三甲苯单晶（SC）的能带结构和表面布里渊区进行了实验研究。在γ-Y方向，空穴的有效质量为2.24 m_0，空穴迁移率μ_h >= 9.0 cm^2/Vs（298 K）。我们进一步表明，即使没有激光，一些picene SC在UPS期间也不显示充电，这表明原始UPS适用于高质量的有机SC。
英文摘要：
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.
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