铁磁金属量子阱态的共振隧穿  

Resonant tunneling through quantum well states in ferromagnetic metallic films

作　　者：卢仲毅[1] 张晓光[2] 

机构地区：[1]中国科学院理论物理研究所,北京100080 [2]美国橡树岭国家实验室

出　　处：《物理》2006年第2期96-99,共4页Physics

摘　　要：非铁磁金属层中的量子阱态在磁输运过程中的重要性已被广泛认识.铁磁金属层中自旋极化的量子阱态以前并没有详尽的理论研究;实验上也没有清晰地观测到自旋极化量子阱态的隧穿.文章介绍了最近由卢仲毅、张晓光和Pantelides[1]预言的Fe/MgO/FeO/Fe/Cr和其他铁磁量子阱隧道结中的共振隧穿,并解释铁、钴、铬的Δ1能带的对称性在这种共振隧穿中的作用.Quantum well states in nonmagnetic metal films between magnetic layers are known to be important in spin-dependent transport. However, there are neither detailed theoretical studies on spin polarized quantum well states in ferromagnetic metal films nor clear experimental observations of electron tunneling through these states. In this paper we discuss the recent theoretical prediction by Zhong-Yi Lu, X.-G. Zhang and Pantelides on the resonant tunneling through Fe/MgO/FeO/Fe/Cr and other ferromagnetic quantum well states in rnagnetoresistance junctions. We further explain how the △1 band symmetry of Fe, Co, and Cr plays a crucial role in such resonant tunneling.

关 键 词：隧道磁阻结 量子阱态 共振隧穿 第一性原理计算 

分 类 号：O481[理学—固体物理]