Hybrid Interface States and Spin Polarization at Ferromagnetic   Metal-Organic Heterojunctions: Interface Engineering for Efficient Spin   Injection in Organic Spintronics
  Ferromagnetic metal-organic semiconductor (FM-OSC) hybrid interfaces have shown to play an important role for spin injection in organic spintronics. Here, 11,11,12,12-tetracyanonaptho-2,6-quinodimethane (TNAP) is introduced as an interfacial layer in Co-OSCs heterojunction with an aim to tune the spin injection. The Co/TNAP interface is investigated by use of X-ray and ultraviolet photoelectron spectroscopy (XPS/UPS), near edge X-ray absorption fine structure (NEXAFS) and X-ray magnetic circular dichroism (XMCD). Hybrid interface states (HIS) are observed at Co/TNAP interface resulting from chemical interaction between Co and TNAP. The energy level alignment at Co/TNAP/OSCs interface is also obtained, and a reduction of the hole injection barrier is demonstrated. XMCD results confirm sizeable spin polarization at the Co/TNAP hybrid interface. 
Shengwei Shi, Zhengyi Sun, Amilcar Bedoya-Pinto, Patrizio Graziosi,   Xin Li, Xianjie Liu, Luis Hueso, Valentin A. Dediu, Yi...
cond-mat.mtrl-sci