Spin-polarization-dependent transport in a quantum dot array coupled with an Aharonov–Bohm ring

doi:10.1088/1674-1056/19/12/127202

Abstract In this paper the quantum transport in a dot-array coupled with an Aharonov–Bohm (AB) ring is investigated via single-band tight-binding Hamiltonian. It is shown that the output spin current is a periodic function of the magnetic flux in the quantum unit $\varPhi_0$. The resonance positions of the total transmission probability do not depend on the size of the AB ring but the electronic spectrum. Moreover, the persistent currents in the AB ring is also spin-polarization dependent and different from the isolated AB ring where the persistent current is independent of spin polarization.

Keywords: spin-polarization transmission AB ring current

Received: 12 March 2010
Revised: 03 August 2010
Accepted manuscript online:

PACS:	72.25.-b	(Spin polarized transport)
	73.21.La	(Quantum dots)
	73.23.Ra	(Persistent currents)

Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 10947163 and 10947164).

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Wang Rui(王瑞), Kong Ling-Min(孔令民), Zhou Yun-Qing(周运清), Zhang Cun-Xi(张存喜), and Xing Zhi-Yong(邢志勇) Spin-polarization-dependent transport in a quantum dot array coupled with an Aharonov–Bohm ring 2010 Chin. Phys. B 19 127202

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Spin-polarization-dependent transport in a quantum dot array coupled with an Aharonov–Bohm ring

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