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arXiv 0709.4246cond-mat.mes-hallcond-mat.str-el
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磁化量子线和自旋链中的自旋轨道效应

Spin-orbital effects in magnetized quantum wires and spin chains

Suhas Gangadharaiah, Jianmin Sun, Oleg A. Starykh

摘要:

本文分析了存在磁场和自旋轨道相互作用的相互作用量子线问题。我们发现,一个有趣的塞曼和自旋轨道的相互作用,促进电子-电子相互作用,结果在自旋密度波(SDW)状态时,磁场和自旋轨道轴是正交的。我们发现,这种不稳定性是加强在一个密切相关的海森堡自旋链与非对称均匀Dzyaloshinskiii-Moriya(DM)相互作用的问题。垂直于DM各向异性轴方向上的磁场导致沿着与所施加的场方向正交的方向的交错的长程磁序。我们探讨的均匀DM相互作用的电子自旋共振(ESR)测量的后果,并指出,他们提供的方式来探测右和左移动的自旋链的激发分开。

英文摘要:

We present analysis of the interacting quantum wire problem in the presence of magnetic field and spin-orbital interaction. We show that an interesting interplay of Zeeman and spin-orbit terms, facilitated by the electron-electron interaction, results in the spin-density wave (SDW) state when the magnetic field and spin-orbit axes are orthogonal. We show that this instability is enhanced in a closely related problem of Heisenberg spin chain with asymmetric uniform Dzyaloshinskii-Moriya (DM) interaction. Magnetic field in the direction perpendicular to the DM anisotropy axis results in staggered long-range magnetic order along the orthogonal to the applied field direction. We explore consequences of the uniform DM interaction for the electron spin resonance (ESR) measurements, and point out that they provide way to probe right- and left-moving excitations of the spin chain separately.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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