Nature Milestones Spin by Nature physics
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Reprinted with permission from REF. 75. Copyright (2003) by the American Physical Society. the intensity of the emitted coherent light could be modulated by controlling the degree of spin polarization of the current injected into the active region. Quantum computation. Spin-based solidstate approaches for quantum computation provide the potential for fixing isolated quantum degrees of freedom in space, by embedding quantum dots or ions within a solid matrix, and then addressing those degrees of freedom with small electrical contacts.
Quantum computation with quantum dots. Phys. Rev. A 57, 120–126 (1998). 63. , Myers, R. , Gossard, A. , Levy, J. & Awschalom, D. D. Gigahertz electron spin manipulation using voltage-controlled g-tensor modulation. Science 299, 1201–1204 (2003). 64. Petta, J. R. et al. Coherent manipulation of coupled electron spins in semiconductor quantum dots. Science 309, 2180–2184 (2005). 65. , van der Wiel, W. , Obata, T. & Tarucha, S. Coherent single electron spin control in a slanting Zeeman field. Phys.
1). The track width of the TMR element is typically 90–100 nm. in the spin valve and magnetic tunnel junctions for pinning the magnetization of the reference magnetic layer. And it can also be used in a new kind of MRAM43, or to fight thermal excitations of magnetic nanoparticles44 for future storage. The growing structural quality of interfaces has led to the spin-dependent quantum confinement of the electrons in metallic ultrathin layers. Together with interfacial band hybridization this now makes it possible to control the exchange interaction between ferromagnetic layers separated by a non-magnetic layer45–49.