Spin-polarized electron transport through nanometer-scale Al grains
作者： L. Y. Zhang , C. Y. Wang , Y. G. Wei , X. Y. Liu , D. Davidović
DOI: 10.1103/PHYSREVB.72.155445
关键词:
摘要: We investigate spin-polarized electron tunneling through ensembles of nanometer-scale Al grains embedded between two Co reservoirs at 4.2 K, and observe tunneling-magnetoresistance (TMR) effects from spin precession in the perpendicular applied magnetic field (the Hanle effect). The spin-coherence time $({T}_{2}^{\ensuremath{\star}})$ measured using effect is order ns. dephasing attributed to local fields. Dephasing process does not destroy TMR, which strongly asymmetric with bias voltage. TMR explained by relaxation dwell times.
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128.84.21.199参考文章(17)
Daniel Loss, David P. DiVincenzo, Quantum computation with quantum dots Physical Review A. ,vol. 57, pp. 120- 126 ,(1998) , 10.1103/PHYSREVA.57.120
Guido Burkard, Hans-Andreas Engel, Daniel Loss, Spintronics and quantum dots for quantum computing and quantum communication Protein Science. ,vol. 48, pp. 965- 986 ,(2000) , 10.1002/1521-3978(200009)48:9/11<965::AID-PROP965>3.0.CO;2-V
A. C. Johnson, J. R. Petta, J. M. Taylor, A. Yacoby, M. D. Lukin, C. M. Marcus, M. P. Hanson, A. C. Gossard, Triplet-singlet spin relaxation via nuclei in a double quantum dot. Nature. ,vol. 435, pp. 925- 928 ,(2005) , 10.1038/NATURE03815
Toshimasa Fujisawa, David Guy Austing, Yasuhiro Tokura, Yoshiro Hirayama, Seigo Tarucha, Allowed and forbidden transitions in artificial hydrogen and helium atoms Nature. ,vol. 419, pp. 278- 281 ,(2002) , 10.1038/NATURE00976
J. M. Elzerman, R. Hanson, L. H. Willems van Beveren, B. Witkamp, L. M. K. Vandersypen, L. P. Kouwenhoven, Single-shot read-out of an individual electron spin in a quantum dot. Nature. ,vol. 430, pp. 431- 435 ,(2004) , 10.1038/NATURE02693
Mark Johnson, R. H. Silsbee, Interfacial charge-spin coupling: Injection and detection of spin magnetization in metals. Physical Review Letters. ,vol. 55, pp. 1790- 1793 ,(1985) , 10.1103/PHYSREVLETT.55.1790
H. R. Zeller, I. Giaever, Tunneling, Zero-Bias Anomalies, and Small Superconductors Physical Review. ,vol. 181, pp. 789- 799 ,(1969) , 10.1103/PHYSREV.181.789
D. C. Ralph, C. T. Black, M. Tinkham, Spectroscopic measurements of discrete electronic states in single metal particles. Physical Review Letters. ,vol. 74, pp. 3241- 3244 ,(1995) , 10.1103/PHYSREVLETT.74.3241
D. Davidović, M. Tinkham, Spectroscopy, Interactions, and Level Splittings in Au Nanoparticles Physical Review Letters. ,vol. 83, pp. 1644- 1647 ,(1999) , 10.1103/PHYSREVLETT.83.1644
Z. W. Zhao, B. K. Tay, Chang Q. Sun, V. Ligatchev, Oxygen lone-pair states near the valence band edge of aluminum oxide thin films Journal of Applied Physics. ,vol. 95, pp. 4147- 4150 ,(2004) , 10.1063/1.1686905