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Impurity Effects and Spin Polarizations in a Narrow Quantum Hall System | | Tapash Chakraborty
; K. Niemelä
; P. Pietiläinen
; | | Date: |
17 Nov 1997 | | Subject: | Mesoscopic Systems and Quantum Hall Effect | cond-mat.mes-hall | | Affiliation: | Max-Planck Institut für Physik Komplexer Systeme, Dresden, Germany), K. Niemelä and P. Pietiläinen (Theoretical Physics, University of Oulu, Finland | | 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 $
u=frac13$ and $
u=frac12$ 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. | | Source: | arXiv, cond-mat/9711158 | | Services: | Forum | Review | PDF | Favorites | |
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