Optically pumped nmr studies of electron spin polarization and dynamics: New constraints on the composite fermion description of ν = 1/2

A. E. Dementyev; N. N. Kuzma; P. Khandelwal; S. E. Barrett; L. N. Pfeiffer; K. W. West

doi:10.1103/PhysRevLett.83.5074

Optically pumped nmr studies of electron spin polarization and dynamics: New constraints on the composite fermion description of ν = 1/2

A. E. Dementyev
, N. N. Kuzma
, P. Khandelwal
, S. E. Barrett
, L. N. Pfeiffer
, K. W. West

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

45 Scopus citations

Abstract

The Knight shift and the nuclear spin-lattice relaxation rate 1/T₁ of ⁷¹Ga nuclei are measured in GaAs quantum wells at Landau level filling factor ν = 1/2 using optically pumped NMR. The data are compared with predictions of a weakly interacting composite fermion model. Our thermodynamic measurements of the electron spin polarization and spin dynamics near the transition between fully and partially spin-polarized ground states provide new constraints on the theoretical description of the ν = 1/2 state. 1999

Original language	English (US)
Pages (from-to)	5074-5077
Number of pages	4
Journal	Physical review letters
Volume	83
Issue number	24
DOIs	https://doi.org/10.1103/PhysRevLett.83.5074
State	Published - Jan 1 1999
Externally published	Yes

All Science Journal Classification (ASJC) codes

General Physics and Astronomy

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10.1103/PhysRevLett.83.5074

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abstract = "The Knight shift and the nuclear spin-lattice relaxation rate 1/T1 of 71Ga nuclei are measured in GaAs quantum wells at Landau level filling factor ν = 1/2 using optically pumped NMR. The data are compared with predictions of a weakly interacting composite fermion model. Our thermodynamic measurements of the electron spin polarization and spin dynamics near the transition between fully and partially spin-polarized ground states provide new constraints on the theoretical description of the ν = 1/2 state. 1999",

author = "Dementyev, \{A. E.\} and Kuzma, \{N. N.\} and P. Khandelwal and Barrett, \{S. E.\} and Pfeiffer, \{L. N.\} and West, \{K. W.\}",

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AU - Dementyev, A. E.

AU - Kuzma, N. N.

AU - Khandelwal, P.

AU - Barrett, S. E.

AU - Pfeiffer, L. N.

AU - West, K. W.

PY - 1999/1/1

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AB - The Knight shift and the nuclear spin-lattice relaxation rate 1/T1 of 71Ga nuclei are measured in GaAs quantum wells at Landau level filling factor ν = 1/2 using optically pumped NMR. The data are compared with predictions of a weakly interacting composite fermion model. Our thermodynamic measurements of the electron spin polarization and spin dynamics near the transition between fully and partially spin-polarized ground states provide new constraints on the theoretical description of the ν = 1/2 state. 1999

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JF - Physical review letters

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ER -

Optically pumped nmr studies of electron spin polarization and dynamics: New constraints on the composite fermion description of ν = 1/2

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