Spin-selective Peierls transition in interacting one-dimensional conductors with spin-orbit interaction
Spin-selective Peierls transition in interacting one-dimensional conductors with spin-orbit interaction
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DOI：
10.1103/physrevb.82.045127
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发表时间：
2010-07-29
影响因子：
3.7
通讯作者：
Loss, Daniel
中科院分区：
文献类型：
--
作者：
Braunecker, Bernd;Japaridze, George I.;Loss, Daniel
一维导体与Rashba自旋-轨道耦合的相互作用显示出自旋选择性Peierls类型的跃迁到自旋-电荷-密度-波态的混合。这种跃迁导致了一半导电模的能隙，这种能隙被电子-电子相互作用强烈地增强。另一半模保持在强烈重整化的无缝隙状态，并在相反的方向上引导相反的自旋，从而提供了一个完美的自旋过滤器。这种转变是由磁场和自旋-轨道相互作用驱动的。作为例子，对于半导体量子线和碳纳米管，由弱磁场或本征自旋-轨道相互作用引起的能隙可以重整化1个数量级，最高可达10-30K。
Interacting one-dimensional conductors with Rashba spin-orbit coupling are shown to exhibit a spin-selective Peierls-type transition into a mixed spin-charge-density-wave state. The transition leads to a gap for one-half of the conducting modes, which is strongly enhanced by electron-electron interactions. The other half of the modes remains in a strongly renormalized gapless state and conducts opposite spins in opposite directions, thus providing a perfect spin filter. The transition is driven by magnetic field and by spin-orbit interactions. As an example we show for semiconducting quantum wires and carbon nanotubes that the gap induced by weak magnetic fields or intrinsic spin-orbit interactions can get renormalized by 1 order of magnitude up to 10-30 K.