科研之友
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摘要
Most Heisenberg-like spin chains flow to a universal free-fermion fixed point near the magnetic-field induced saturation point. Here, we show that an exotic fixed point, characterized by two species of low-energy excitations with mutual anyonic statistics, may also emerge in such spin chains if the dispersion relation has two minima. By using bosonization, two-magnon exact calculations, and numerical densitymatrix-renormalization-group calculations, we demonstrate the existence of this anyonic-liquid fixed point in an XXZ spin chain with up to second-neighbor interactions. We also identify a range of microscopic parameters, which support this phase.
- 出版日期2014-12-29
- 单位Los Alamos; 东北大学
