Patent ID: 8097909
Filing Date: 2012-01-17
Classification: B82Y,G11C,H01L

Abstract:
1. A transistor comprising: a ferromagnetic source that is made of a half metal exhibiting a metallic band structure for one of the spins (“metallic spin band”) while exhibiting a semiconductor-like or insulator-like band structure for the other spin (“semiconductor spin band”), the half metal being a ferromagnetic body, spin-polarized conduction carriers being injected from the ferromagnetic source; a ferromagnetic drain that is made of a half metal and receives the spin-polarized conduction carriers injected from the ferromagnetic source; a semiconductor layer that is provided between the ferromagnetic source and the ferromagnetic drain, and is joined to the ferromagnetic source and the ferromagnetic drain; and a gate electrode that is formed associated with the semiconductor layer, wherein: with the conduction carriers having the same conduction type as the conduction type of the semiconductor layer (“accumulation channel type”), when the conduction carriers are electrons, the Schottky barrier formed by the metallic spin band appears on the conduction band side; and when the conduction carriers are holes, the Schottky barrier formed by the metallic spin band appears on the valence band side.