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

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

Research output: Contribution to journalArticle

1 Citation (Scopus)

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 languageEnglish
Article number022026
JournalJournal of Physics: Conference Series
Volume150
Issue number2
DOIs
Publication statusPublished - 01-01-2009

Fingerprint

electron paramagnetic resonance
quantum dots
tunnels
excitation
electron spin
modulation
ground state

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Hitachi, Keisuke ; Inoue, A. ; Oiwa, A. ; Yamamoto, M. ; Pioro-Ladriere, M. ; Tokura, Y. ; Tarucha, S. / Negative differential conductance in a quantum dot and possible application to ESR detection. In: Journal of Physics: Conference Series. 2009 ; Vol. 150, No. 2.
@article{6f27b57b44f74719ae631db2f67aacef,
title = "Negative differential conductance in a quantum dot and possible application to ESR detection",
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.",
author = "Keisuke Hitachi and A. Inoue and A. Oiwa and M. Yamamoto and M. Pioro-Ladriere and Y. Tokura and S. Tarucha",
year = "2009",
month = "1",
day = "1",
doi = "10.1088/1742-6596/150/2/022026",
language = "English",
volume = "150",
journal = "Journal of Physics: Conference Series",
issn = "1742-6588",
publisher = "IOP Publishing Ltd.",
number = "2",

}

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 journalArticle

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.

UR - http://www.scopus.com/inward/record.url?scp=77952532011&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=77952532011&partnerID=8YFLogxK

U2 - 10.1088/1742-6596/150/2/022026

DO - 10.1088/1742-6596/150/2/022026

M3 - Article

VL - 150

JO - Journal of Physics: Conference Series

JF - Journal of Physics: Conference Series

SN - 1742-6588

IS - 2

M1 - 022026

ER -