凝聚态物理
电阻率和电导率
导线
材料科学
自旋(空气动力学)
铁磁性
金属
隧道枢纽
半导体
电导率
导电体
隧道磁电阻
电阻和电导
物理
量子隧道
热力学
量子力学
光电子学
复合材料
冶金
出处
期刊:Physical review
日期:2000-12-15
卷期号:62 (24): R16267-R16270
被引量:1162
标识
DOI:10.1103/physrevb.62.r16267
摘要
Theory of electrical spin injection from a ferromagnetic (FM) metal into a normal (N) conductor is presented. We show that tunnel contacts (T) can dramatically increase spin injection and solve the problem of the mismatch in the conductivities of a FM metal and a semiconductor microstructure. We also present explicit expressions for the spin-valve resistance of FM-T-N- and FM-T-N-T-FM-junctions with tunnel contacts at the interfaces and show that the resistance includes both positive and negative contributions (Kapitza resistance and injection conductivity, respectively).
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