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 | |
| Publication status | Published - 01-01-2009 |
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All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)
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Negative differential conductance in a quantum dot and possible application to ESR detection. / Hitachi, Keisuke; Inoue, A.; Oiwa, A.; Yamamoto, M.; Pioro-Ladriere, M.; Tokura, Y.; Tarucha, S.
In: Journal of Physics: Conference Series, Vol. 150, No. 2, 022026, 01.01.2009.Research output: Contribution to journal › Article
TY - JOUR
T1 - Negative differential conductance in a quantum dot and possible application to ESR detection
AU - Hitachi, Keisuke
AU - Inoue, A.
AU - Oiwa, A.
AU - Yamamoto, M.
AU - Pioro-Ladriere, M.
AU - Tokura, Y.
AU - Tarucha, S.
PY - 2009/1/1
Y1 - 2009/1/1
N2 - 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.
AB - 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.
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U2 - 10.1088/1742-6596/150/2/022026
DO - 10.1088/1742-6596/150/2/022026
M3 - Article
AN - SCOPUS:77952532011
VL - 150
JO - Journal of Physics: Conference Series
JF - Journal of Physics: Conference Series
SN - 1742-6588
IS - 2
M1 - 022026
ER -