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Termination of the spin-resolved integer quantum Hall effect

L. W. Wong·H. W. Jiang·E. Palm·W. J. Schaff
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Abstract

We report a magnetotransport study of the termination of the spin-resolved integer quantum Hall effect by controlled disorder in a gated GaAs/AlGaAs heterostructure. We have found that, for a given N^{th} Landau level, the difference in filling factors of a pair of spin-split resistivity peaks δν_{N}changes rapidly from one to zero near a critical density n_{c}. Scaling analysis shows that δν_{N} collapses onto a single curve independent of N when plotted against the parameter (n-n_{c})/n_{c} for five Landau levels. The effect of increasing the Zeeman energy is also examined by tilting the direction of magnetic field relative to the plane of the two-dimensional electron gas. Our experiment suggests that the termination of the spin-resolved quantum Hall effect is a phase transition.

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L. W. Wong, H. W. Jiang, E. Palm, W. J. Schaff. 1997-02-04. Termination of the spin-resolved integer quantum Hall effect. https://doi.org/10.1103/physrevb.55.r7343

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