Integer-Quantized Hall Effect in Spin-Wave Phases of Two-Dimensional Conductors
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概要
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A tight-binding Hamiltonian is used to study integer quantization of Hall conductivity o., in spin-density-wave (SDW) ordered phases of two-dimensional conductors.A fractional number of magnetic flux quanta per unit cell creates energy gaps withintight-binding bands; o., values of both signs arise naturally, even in the presence ofonly one type of charge carrier. Although o., is a topological invariant determined byzeros of electron wave function components in the Brillouin zone, it changes undervariation of the SDW amplitude in fixed magnetic field, as pairs of zeros coalesce andannihilate.
- 社団法人日本物理学会の論文
- 1990-05-15
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