Current-induced nuclear-spin activation in a two-dimensional electron gas

C. R. Dean; B. A. Piot; G. Gervais; L. N. Pfeiffer; K. W. West

doi:10.1103/PhysRevB.80.153301

Current-induced nuclear-spin activation in a two-dimensional electron gas

C. R. Dean, B. A. Piot, G. Gervais, L. N. Pfeiffer, K. W. West

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

17 Scopus citations

Abstract

Electrically detected nuclear magnetic resonance was studied in detail in a two-dimensional electron gas as a function of current bias and temperature. We show that applying a relatively modest dc-current bias Idc 0.5 μA can induce an enhanced nuclear-spin signal compared with the signal obtained under similar thermal equilibrium conditions at zero current bias. Our observations suggest that dynamic nuclear-spin polarization by small current flow is possible in a two-dimensional electron gas, allowing for easy manipulation of the nuclear spin by simple switching of a dc current.

Original language	English (US)
Article number	153301
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	80
Issue number	15
DOIs	https://doi.org/10.1103/PhysRevB.80.153301
State	Published - Oct 1 2009
Externally published	Yes

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1103/PhysRevB.80.153301

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abstract = "Electrically detected nuclear magnetic resonance was studied in detail in a two-dimensional electron gas as a function of current bias and temperature. We show that applying a relatively modest dc-current bias Idc 0.5 μA can induce an enhanced nuclear-spin signal compared with the signal obtained under similar thermal equilibrium conditions at zero current bias. Our observations suggest that dynamic nuclear-spin polarization by small current flow is possible in a two-dimensional electron gas, allowing for easy manipulation of the nuclear spin by simple switching of a dc current.",

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AU - Piot, B. A.

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AU - Pfeiffer, L. N.

AU - West, K. W.

PY - 2009/10/1

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N2 - Electrically detected nuclear magnetic resonance was studied in detail in a two-dimensional electron gas as a function of current bias and temperature. We show that applying a relatively modest dc-current bias Idc 0.5 μA can induce an enhanced nuclear-spin signal compared with the signal obtained under similar thermal equilibrium conditions at zero current bias. Our observations suggest that dynamic nuclear-spin polarization by small current flow is possible in a two-dimensional electron gas, allowing for easy manipulation of the nuclear spin by simple switching of a dc current.

AB - Electrically detected nuclear magnetic resonance was studied in detail in a two-dimensional electron gas as a function of current bias and temperature. We show that applying a relatively modest dc-current bias Idc 0.5 μA can induce an enhanced nuclear-spin signal compared with the signal obtained under similar thermal equilibrium conditions at zero current bias. Our observations suggest that dynamic nuclear-spin polarization by small current flow is possible in a two-dimensional electron gas, allowing for easy manipulation of the nuclear spin by simple switching of a dc current.

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Current-induced nuclear-spin activation in a two-dimensional electron gas

Abstract

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