The Nature Of The Current Spin Polarization In The Organic Semiconductor Research

The electron is a quantum mechanical object which, apart from charge, also has aspin. Devices and integrated circuits based on the electronic charges and theirtransportation have been widely used in the world. Electrons and holes enrichment thetransport characters of semiconductor materials. However, the electron is treated asthe carrier of the charge and the spin of the electron usually are neglected. Thediscovery of GMR (giant magnetoresistance) and TMR (tunneling magnetoresistance)in metallic spin valves have revolutionized applications such as magnetic recordingand memory, and launched the new field of spin electronics—'spintronics', which iscentered on the electron spin including their generation, transport and detection.Electron spin injection and spin dependent transport are essential aspects ofspintronics and have been extensively studied in a number of different contextsincluding: from ferromagnetic metals to superconductors; from ferromagnetic metalsto normal metals; from ferromagnetic metals to nonmagnetic semiconductors andfrom magnetic semiconductors to nonmagnetic semiconductors or the mixture ofthem.Spintronics is based on the magnetics and microelectronics. In the spintronic devices, it is not the electron charge but the electron spin that carries information, and this offers opportunities for a new generation devices using the charge and the spin of electrons together. This device may further enhance the information technology and thus create a new complexation, for example, to incorporate massive storage with information processing, or to inject spin polarized current to control the spin state of carriers. The advantages of the spintronic devices would be nonvolatility, increased data processing speed, decreased electronic power consumption, and increased integration densities. The intrinsic binary nature of electronic spin suggests it could be used as the basic unit, the qubit, for quantum computation and communication. Conventional spin valves have been widely used in computers since the mid 1990s.Compared with conventional semiconductors, organic semiconductors have...