Single-atom spintronics

来源 :中国有色金属学会会刊(英文版) | 被引量 : 0次 | 上传用户:woyaoqian115
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
Recent work on magnetic quantum point contacts (QPCs) was discussed. Complete magnetoresistance loops across Co QPCs as small as a single atom was measured. The remarkable feature of these QPCs is the rapid oscillatory decay in magnetoresistance with the increase of contact size. In addition,stepwise or quantum magnetoresistance loops are observed,resulting from varying transmission probability of the available discrete conductance channels because the sample is cycled between the ferromagnetic (F) and antiferromagnetic (AF) aligned states. Quantized conductance combined with spin dependent transmission of electron waves gives rise to a multi-channel system with a quantum domain wall acting as a valve,i.e.,a quantum spin-valve. Behavior of a few-atom QPC is built on the behavior of a single-atom QPC and hence the summarization of results as single-atom spintronics. An evolutionary trace of spin-dependent electron transmission from a single atom to bulk is provided,the requisite hallmarks of artefact-free magnetoresistance is established across a QPC - stepwise or quantum magnetoresistance loops and size dependent oscillatory magnetoresistance.
其他文献
通过回顾克山病(Keslnan disease)、硒(selenium)缺乏与柯萨奇病毒(Coxsackie virus)感染及其基因变异的研究结果,结合硒缺乏可以引起柯萨奇病毒与其他病毒发生基因变异,以及
本文首先从s.526卷尾所署的闰月切入,然后结合敦煌写卷、敦煌石窟等原始材料,认为卷中的阴氏夫人是张承奉的母亲,阿郎是张承奉,该写卷产生于张承奉时期,这个时期有一位阴姓的
以台湾红皮(Cardinal)为试验材料,研究了不同营养水平对马铃薯块茎发育过程中内源激素行为的影响及对产量和品质形成的影响.结果表明,过低、过高的营养供给,降低了块茎发育前
以杂交育种方法,结合系统育种以及测交、筛选,育成抗逆性强的红云A系、红云B系,与本所"九五"期间选育储备的优良中系品种蒙革A、蒙草B组配成"蒙草×红云"四元杂交种.经实验室
以4只装有永久性瘤胃瘘管的新疆美利奴羊为试验动物,采用4×4拉丁方设计,研究添加10 g/d的吐温对绵羊瘤胃消化代谢的影响.在4期试验中每只羊分别添加吐温40、吐温60、吐温80
本文对胜利村和西北村的蔬菜生产系统进行了定量描述,胜利村和西北村位于中国四川彭州市郊区,在该区域种植了种类繁多的蔬菜品种.其中最重要的是大蒜和莴笋.描述了区域土壤和
[目的]研究冷却真空包装辐照猪肉异味气体主要成分和寻找异味源,为探明异味产生机理及去除方法奠定理论基础.[方法]用真空系统液氮冷却装置收集冷却真空包装猪肉辐照异味气体
用点格局分布、混交度和胸径大小比数3个林分空间结构参数,分析了1985与2005年长白山落叶松人工林与天然林木混交林分的空间结构变化.结果表明:在空间分布上,入侵的天然树种
According to the deformation state in skin stretch forming, an experiment was investigated to determine the critical strain,which make the slip line occur, and
Not only the isothermal oxidation behaviors at 900-1 300 ℃ for 20 h in air of bulk Ti3AlC2 with 2.8% TiC which was sintered by hot pressing with the additive o