Probing spin states in quantum dots by spin-resolved one-dimensional contacts

K. Hitachi, M. Yamamoto, S. Tarucha

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We fabricate a quantum dot (QD) with tunnel-coupled quantum wires (QWs) to study the electronic states of the QD with the QWs as spin filters. The propagating modes of the QWs are adjusted with gate voltages to be either spin-resolved (n=1) or spin degenerate (n=2) under finite magnetic fields. Only for the n=1 QWs, we observe large and small Coulomb peaks alternating with magnetic field in the filling factor regime of ν=2 to 4, which is assigned to singlet-triplet transitions induced by correlation effects.

Original languageEnglish
Title of host publicationLOW TEMPERATURE PHYSICS
Subtitle of host publication24th International Conference on Low Temperature Physics - LT24
Pages1367-1368
Number of pages2
Volume850
DOIs
Publication statusPublished - 01-12-2006
EventLOW TEMPERATURE PHYSICS: 24th International Conference on Low Temperature Physics - LT24 - Orlando, FL, United States
Duration: 10-08-200617-10-2006

Other

OtherLOW TEMPERATURE PHYSICS: 24th International Conference on Low Temperature Physics - LT24
CountryUnited States
CityOrlando, FL
Period10-08-0617-10-06

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quantum wires
quantum dots
magnetic fields
tunnels
filters
electric potential
electronics

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Hitachi, K., Yamamoto, M., & Tarucha, S. (2006). Probing spin states in quantum dots by spin-resolved one-dimensional contacts. In LOW TEMPERATURE PHYSICS: 24th International Conference on Low Temperature Physics - LT24 (Vol. 850, pp. 1367-1368) https://doi.org/10.1063/1.2355215
Hitachi, K. ; Yamamoto, M. ; Tarucha, S. / Probing spin states in quantum dots by spin-resolved one-dimensional contacts. LOW TEMPERATURE PHYSICS: 24th International Conference on Low Temperature Physics - LT24. Vol. 850 2006. pp. 1367-1368
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Hitachi, K, Yamamoto, M & Tarucha, S 2006, Probing spin states in quantum dots by spin-resolved one-dimensional contacts. in LOW TEMPERATURE PHYSICS: 24th International Conference on Low Temperature Physics - LT24. vol. 850, pp. 1367-1368, LOW TEMPERATURE PHYSICS: 24th International Conference on Low Temperature Physics - LT24, Orlando, FL, United States, 10-08-06. https://doi.org/10.1063/1.2355215

Probing spin states in quantum dots by spin-resolved one-dimensional contacts. / Hitachi, K.; Yamamoto, M.; Tarucha, S.

LOW TEMPERATURE PHYSICS: 24th International Conference on Low Temperature Physics - LT24. Vol. 850 2006. p. 1367-1368.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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AB - We fabricate a quantum dot (QD) with tunnel-coupled quantum wires (QWs) to study the electronic states of the QD with the QWs as spin filters. The propagating modes of the QWs are adjusted with gate voltages to be either spin-resolved (n=1) or spin degenerate (n=2) under finite magnetic fields. Only for the n=1 QWs, we observe large and small Coulomb peaks alternating with magnetic field in the filling factor regime of ν=2 to 4, which is assigned to singlet-triplet transitions induced by correlation effects.

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Hitachi K, Yamamoto M, Tarucha S. Probing spin states in quantum dots by spin-resolved one-dimensional contacts. In LOW TEMPERATURE PHYSICS: 24th International Conference on Low Temperature Physics - LT24. Vol. 850. 2006. p. 1367-1368 https://doi.org/10.1063/1.2355215