期刊
PHYSICAL REVIEW LETTERS
卷 85, 期 17, 页码 3688-3691出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.85.3688
关键词
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We demonstrate that the temperature dependence of the electron spin polarization for the fractional states v = 1/3 and v = 2/3 displays activated behavior. This study enables the first measurement of the fractional quantum Hall spin-flip gaps. They are found to be systematically larger in comparison with the gaps simultaneously measured in transport. For y = 1/3 and v = 1/2, these spin-flip gaps allow the determination of the composite fermion interaction energy. This energy is investigated as a function of the finite width of the 2D channel.
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