Abstract This paper detailedly studies the transmission probability, the spin polarization and the conductance of the ballistic electron in a nanostructure with the periodic magnetic-electric barriers. These observable quantities are found to be strongly dependent not only on the magnetic configuration, the incident electron energy and the incident wave vector, but also on the number of the periodic magnetic-electric barriers. The transmission coefficient and the spin polarization show a periodic pattern with the increase of the separation between two adjacent magnetic fields, and the resonance splitting increases as the number of periods increases. Surprisingly, it is found that a polarization can be achieved by spin-dependent resonant tunnelling in this structure, although the average magnetic field of the structure is zero.
Received: 21 January 2007
Revised: 02 March 2007
Accepted manuscript online:
PACS:
73.63.-b
(Electronic transport in nanoscale materials and structures)
Fund: Project supported by the
Scientific Research Fund of Hubei Provincial Education
Department (Grant No 080043).
Cite this article:
Lu Jian-Duo(卢建夺), Shao Liang(邵亮), Hou Yang-Lai(侯阳来), and Dai Hou-Mei(戴厚梅) The electron transport characters in a nanostructure with the periodic magnetic-electric barriers 2007 Chinese Physics 16 3080
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