Nuclear spin switch in semiconductor quantum dots

A. I. Tartakovskii; T. Wright; A. Russell; V. I. Fal'Ko; A. B. Van'Kov; J. Skiba-Szymanska; I. Drouzas; R. S. Kolodka; M. S. Skolnick; P. W. Fry; A. Tahraoui; H. Y. Liu; M. Hopkinson

doi:10.1103/PhysRevLett.98.026806

Nuclear spin switch in semiconductor quantum dots

A. I. Tartakovskii, T. Wright, A. Russell, V. I. Fal'Ko, A. B. Van'Kov, J. Skiba-Szymanska, I. Drouzas, R. S. Kolodka, M. S. Skolnick, P. W. Fry, A. Tahraoui, H. Y. Liu, M. Hopkinson

Research output: Contribution to journal › Article › peer-review

Abstract

We show that by illuminating an InGaAs/GaAs self-assembled quantum dot with circularly polarized light, the nuclei of atoms constituting the dot can be driven into a bistable regime, in which either a thresholdlike enhancement or reduction of the local nuclear field by up to 3 T can be generated by varying the pumping intensity. The excitation power threshold for such a nuclear spin "switch" is found to depend on both the external magnetic and electric fields. The switch is shown to arise from the strong feedback of the nuclear spin polarization on the dynamics of the spin transfer from electrons to the nuclei of the dot.

Original language	English
Article number	026806
Journal	Physical Review Letters
Volume	98
Issue number	2
DOIs	https://doi.org/10.1103/PhysRevLett.98.026806
Publication status	Published - 2007

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10.1103/PhysRevLett.98.026806

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title = "Nuclear spin switch in semiconductor quantum dots",

abstract = "We show that by illuminating an InGaAs/GaAs self-assembled quantum dot with circularly polarized light, the nuclei of atoms constituting the dot can be driven into a bistable regime, in which either a thresholdlike enhancement or reduction of the local nuclear field by up to 3 T can be generated by varying the pumping intensity. The excitation power threshold for such a nuclear spin {"}switch{"} is found to depend on both the external magnetic and electric fields. The switch is shown to arise from the strong feedback of the nuclear spin polarization on the dynamics of the spin transfer from electrons to the nuclei of the dot.",

author = "Tartakovskii, {A. I.} and T. Wright and A. Russell and Fal'Ko, {V. I.} and Van'Kov, {A. B.} and J. Skiba-Szymanska and I. Drouzas and Kolodka, {R. S.} and Skolnick, {M. S.} and Fry, {P. W.} and A. Tahraoui and Liu, {H. Y.} and M. Hopkinson",

year = "2007",

doi = "10.1103/PhysRevLett.98.026806",

language = "English",

volume = "98",

journal = "Physical Review Letters",

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T1 - Nuclear spin switch in semiconductor quantum dots

AU - Tartakovskii, A. I.

AU - Wright, T.

AU - Russell, A.

AU - Fal'Ko, V. I.

AU - Van'Kov, A. B.

AU - Skiba-Szymanska, J.

AU - Drouzas, I.

AU - Kolodka, R. S.

AU - Skolnick, M. S.

AU - Fry, P. W.

AU - Tahraoui, A.

AU - Liu, H. Y.

AU - Hopkinson, M.

PY - 2007

Y1 - 2007

N2 - We show that by illuminating an InGaAs/GaAs self-assembled quantum dot with circularly polarized light, the nuclei of atoms constituting the dot can be driven into a bistable regime, in which either a thresholdlike enhancement or reduction of the local nuclear field by up to 3 T can be generated by varying the pumping intensity. The excitation power threshold for such a nuclear spin "switch" is found to depend on both the external magnetic and electric fields. The switch is shown to arise from the strong feedback of the nuclear spin polarization on the dynamics of the spin transfer from electrons to the nuclei of the dot.

AB - We show that by illuminating an InGaAs/GaAs self-assembled quantum dot with circularly polarized light, the nuclei of atoms constituting the dot can be driven into a bistable regime, in which either a thresholdlike enhancement or reduction of the local nuclear field by up to 3 T can be generated by varying the pumping intensity. The excitation power threshold for such a nuclear spin "switch" is found to depend on both the external magnetic and electric fields. The switch is shown to arise from the strong feedback of the nuclear spin polarization on the dynamics of the spin transfer from electrons to the nuclei of the dot.

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U2 - 10.1103/PhysRevLett.98.026806

DO - 10.1103/PhysRevLett.98.026806

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VL - 98

JO - Physical Review Letters

JF - Physical Review Letters

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ER -

Nuclear spin switch in semiconductor quantum dots

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