凝聚态物理
空中骑兵
自旋电子学
旋转
旋转扭矩传递
涡流
物理
旋转泵
自旋(空气动力学)
电流(流体)
自旋流
扭矩
电流
格子(音乐)
电场
材料科学
磁场
磁化
隧道磁电阻
铁磁性
量子力学
热力学
声学
作者
Florian Jonietz,S. Mühlbauer,C. Pfleiderer,Andreas Neubauer,W. Münzer,Andreas Bauer,Terry R. Adams,R. Georgii,P. Böni,R. A. Duine,Karin Everschor,Markus Garst,Achim Rosch
出处
期刊:Science
[American Association for the Advancement of Science (AAAS)]
日期:2010-12-17
卷期号:330 (6011): 1648-1651
被引量:1025
标识
DOI:10.1126/science.1195709
摘要
Spin Control Controlling and manipulating the spin of an electron is a central requirement for applications in spintronics. Some of the challenges researchers are facing include efficient creation of spin currents, minimization of Joule heating, and extending the lifetime of electronic spins, which is especially important for quantum information applications. Costache and Valenzuela (p. 1645 ) address the first challenge by designing and fabricating an efficient and simple superconducting-based single-electron transistor that can produce spin current with controlled flow. Key to the design is asymmetric tunneling, which leads to a ratchet effect (or diode-like behavior), allowing the separation of up and down spins. Jonietz et al. (p. 1648 ) use electric currents five orders of magnitude smaller than those used previously in nanostructures to manipulate magnetization in a bulk material, MnSi, pointing the way toward decreased Joule heating in spintronic devices. This so-called spin-torque effect causes the rotation of the skyrmion lattice of spins, characteristic of MnSi, which is detected by neutron scattering. Finally, McCamey et al. (p. 1652 ) extend the short lifetime of an electronic spin of a phosphorous dopant by mapping it onto the much longer lived nuclear spin of the atom. Mapping the nuclear spin back onto the electronic spin allows production of a spin memory with a storage time exceeding 100s, which should prove useful for future practical applications.
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