Negative differential conductance in a quantum dot and possible application to ESR detection

K. Hitachi; A. Inoue; A. Oiwa; M. Yamamoto; M. Pioro-Ladriere; Y. Tokura; S. Tarucha

doi:10.1088/1742-6596/150/2/022026

Negative differential conductance in a quantum dot and possible application to ESR detection

K. Hitachi, A. Inoue, A. Oiwa, M. Yamamoto, M. Pioro-Ladriere, Y. Tokura, S. Tarucha

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Abstract

We propose a new scheme of detecting electron spin resonance (ESR) using a single quantum dot (QD). Suppose up-spin (down-spin) electrons can only transport through the ground (excited) state with a large (small) tunnel coupling. Negative differential conductance (NDC) appears when both states enter the transport window because of dynamical population of the excited state. This NDC can be restored by ESR when the dot-lead coupling of the ground and excited states is asymmetric between the two tunnel barriers. We first experimentally characterize the conditions of NDC, which appears when edge states are formed in the leads, to derive the parameters of tunnel coupling. We finally calculate the modulation of QD current induced by ESR to lift the NDC characteristic.

Original language	English
Article number	022026
Journal	Journal of Physics: Conference Series
Volume	150
Issue number	2
DOIs	https://doi.org/10.1088/1742-6596/150/2/022026
Publication status	Published - 01-01-2009
Externally published	Yes

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All Science Journal Classification (ASJC) codes

Physics and Astronomy(all)

Cite this

Hitachi, K., Inoue, A., Oiwa, A., Yamamoto, M., Pioro-Ladriere, M., Tokura, Y., & Tarucha, S. (2009). Negative differential conductance in a quantum dot and possible application to ESR detection. Journal of Physics: Conference Series, 150(2), [022026]. https://doi.org/10.1088/1742-6596/150/2/022026

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AU - Hitachi, K.

AU - Inoue, A.

AU - Oiwa, A.

AU - Yamamoto, M.

AU - Pioro-Ladriere, M.

AU - Tokura, Y.

AU - Tarucha, S.

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10.1088/1742-6596/150/2/022026