Spin Electronics

Front Cover
David D. Awschalom
Springer Science & Business Media, 2004 - Science - 198 pages
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The history of scientific research and technological development is replete with examples of breakthroughs that have advanced the frontiers of knowledge, but seldom does it record events that constitute paradigm shifts in broad areas of intellectual pursuit. One notable exception, however, is that of spin electronics (also called spintronics, magnetoelectronics or magnetronics), wherein information is carried by electron spin in addition to, or in place of, electron charge. It is now well established in scientific and engineering communities that Moore's Law, having been an excellent predictor of integrated circuit density and computer performance since the 1970s, now faces great challenges as the scale of electronic devices has been reduced to the level where quantum effects become significant factors in device operation. Electron spin is one such effect that offers the opportunity to continue the gains predicted by Moore's Law, by taking advantage of the confluence of magnetics and semiconductor electronics in the newly emerging discipline of spin electronics. From a fundamental viewpoine, spin-polarization transport in a material occurs when there is an imbalance of spin populations at the Fermi energy. In ferromagnetic metals this imbalance results from a shift in the energy states available to spin-up and spin-down electrons. In practical applications, a ferromagnetic metal may be used as a source of spin-polarized electronics to be injected into a semiconductor, a superconductor or a normal metal, or to tunnel through an insulating barrier.
 

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Contents

Spin ElectronicsIs It the Technology of the Future?
1
References
7
Conclusions
17
Characterization of Magnetic Nanostructures
25
References
32
Research Activities in Japan
41
Optoelectronic Manipulation of Spin in Semiconductors
49
Magnetoelectronic Devices
61
Comparison of Japan and Europe Research with
67
B Appendix B Site ReportsEurope
78
Appendix C Site Reports Japan
127
Appendix D Highlights of Recent U S Research
173
E Appendix E Glossary
193
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