1997/11/17 by Tapash Chakraborty, K. Niemelä, Pekka Pietiläinen +1
Physics and Astronomy · #Condensed matter physics #Electron #Ground state #Impurity #Knight shift #Physics #Physics of Superconductivity and Magnetism #Quantum Hall effect #Quantum and electron transport phenomena #Quantum mechanics #Quantum spin Hall effect #Spectroscopy #Spin (aerodynamics) #Spin Hall effect #Spin polarization #Topological Materials and Phenomena #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevb.58.9890
4 pages, REVTEX, and 4 .ps files
arxiv created 1997/11/17 · openalex publication_date 1998/10/15 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
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 lead to unique spin transitions at \ensuremathν=(1)/(3) and \ensuremathν=(1)/(2) and the pair-correlation functions provide clues about the nature of different ground states in the system. These results can be explored in optical spectroscopy and optically pumped NMR Knight-shift measurements.