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首页> 外文期刊>Physical review. B, Condensed Matter And Materials Physics >Solitonic excitations in linearly coherent channels of bilayer quantum Hall stripes
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Solitonic excitations in linearly coherent channels of bilayer quantum Hall stripes

机译：双层量子霍尔条纹的线性相干通道中的孤子激发

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摘要

In some range of interlayer distances, the ground state of the two-dimensional electron gas at filling factor v=4N+1 with N=0,1,2,... is a coherent stripe phase in the Hartree-Fock approximation. This phase has one-dimensional coherent channels that support charged excitations in the form of pseudospin solitons. In this work, we compute the transport gap of the coherent striped phase due to the creation of soliton-antisoliton pairs using a supercell microscopic unrestricted Hartree-Fock approach. We study this gap as a function of interlayer distance and tunneling amplitude. Our calculations confirm that the soliton-antisoliton excitation energy is lower than the corresponding Hartree-Fock electron-hole pair energy. We compare our results with estimates of the transport gap obtained from a field-theoretic model valid in the limit of slowly varying pseudospin textures.
机译：在层间距离的某些范围内，二维电子气在填充因子v = 4N + 1且N = 0,1,2，...时的基态在Hartree-Fock近似中为相干条纹相。此阶段具有一维相干通道，这些通道支持伪自旋孤子形式的带电激发。在这项工作中，我们使用超级单元微观无限制Hartree-Fock方法计算由于创建孤子-反孤子对而导致的相干条纹相的传输间隙。我们研究该间隙作为层间距离和隧穿幅度的函数。我们的计算证实了孤子-反孤子的激发能低于相应的Hartree-Fock电子-空穴对能。我们将我们的结果与从在缓慢变化的伪自旋纹理的限制中有效的场理论模型获得的传输间隙的估计值进行比较。

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