Impurity Effects and Spin Polarizations in a Narrow Quantum Hall System

Abstract

The temperature dependence of electron spin polarization for a narrow quantum Hall system shows behavior analogous to that of a two-dimensional system at major filling factors. At the lowest half-filled quantum Hall state for which no two-dimensional analog exists, we find a stable spin partially-polarized system. Periodic Gaussian repulsive impurities (antidots) in such a system leads to novel spin transitions at $\nu =\frac{1}{3}$ and $\nu =\frac{1}{2}$ and the pair-correlation functions provide clues about nature of different ground states in the system. These results can be explored in optical spectroscopy and optically pumped NMR Knight shift measurements.

4 pages, REVTEX, and 4 .ps files

References in corpus (3)

• Observation of the e/3 Fractionally Charged Laughlin Quasiparticles
• Spin Polarizations at and about the Lowest Filled Landau Level
• Theory of Incompressible States in a Narrow Channel

Cited by in corpus (1)

• Temperature dependence of spin polarizations at higher Landau Levels