Optical probing of the spin polarization of the ν=5/2 quantum hall state

M. Stern; P. Plochocka; V. Umansky; D. K. Maude; M. Potemski; I. Bar-Joseph

doi:10.1103/PhysRevLett.105.096801

Optical probing of the spin polarization of the ν=5/2 quantum hall state

M. Stern, P. Plochocka, V. Umansky, D. K. Maude, M. Potemski, I. Bar-Joseph

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Abstract

We apply polarization resolved photoluminescence spectroscopy to measure the spin polarization of a two dimensional electron gas in perpendicular magnetic field. We find that the splitting between the σ⁺ and σ^- polarizations exhibits a sharp drop at ν=5/2 and is equal to the bare Zeeman energy, which resembles the behavior at even filling factors. We show that this behavior is consistent with filling factor ν=5/2 being unpolarized.

Original language	English
Article number	096801
Journal	Physical Review Letters
Volume	105
Issue number	9
DOIs	https://doi.org/10.1103/PhysRevLett.105.096801
State	Published - 23 Aug 2010
Externally published	Yes

Funding

Funders	Funder number
Seventh Framework Programme	221249

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10.1103/PhysRevLett.105.096801

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abstract = "We apply polarization resolved photoluminescence spectroscopy to measure the spin polarization of a two dimensional electron gas in perpendicular magnetic field. We find that the splitting between the σ+ and σ- polarizations exhibits a sharp drop at ν=5/2 and is equal to the bare Zeeman energy, which resembles the behavior at even filling factors. We show that this behavior is consistent with filling factor ν=5/2 being unpolarized.",

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AU - Plochocka, P.

AU - Umansky, V.

AU - Maude, D. K.

AU - Potemski, M.

AU - Bar-Joseph, I.

PY - 2010/8/23

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N2 - We apply polarization resolved photoluminescence spectroscopy to measure the spin polarization of a two dimensional electron gas in perpendicular magnetic field. We find that the splitting between the σ+ and σ- polarizations exhibits a sharp drop at ν=5/2 and is equal to the bare Zeeman energy, which resembles the behavior at even filling factors. We show that this behavior is consistent with filling factor ν=5/2 being unpolarized.

AB - We apply polarization resolved photoluminescence spectroscopy to measure the spin polarization of a two dimensional electron gas in perpendicular magnetic field. We find that the splitting between the σ+ and σ- polarizations exhibits a sharp drop at ν=5/2 and is equal to the bare Zeeman energy, which resembles the behavior at even filling factors. We show that this behavior is consistent with filling factor ν=5/2 being unpolarized.

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Optical probing of the spin polarization of the ν=5/2 quantum hall state

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