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arXiv 0911.3206cond-mat.str-el
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Rashba自旋轨道耦合诱导的大极化子形成

Large polaron formation induced by Rashba spin-orbit coupling

C. Grimaldi

摘要:

本文研究了绝热极限下二维正方晶格中具有Rashba自旋轨道相互作用的电声子Holstein模型。结果表明,当Rashba项不为零时,零自旋轨道耦合的离域电子局域化为大极化子态。这种自旋-轨道诱导极化子态具有与Rashba耦合$γ$成反比的局域化长度,并且它支配$γ$ - $λ$相图的宽区域,其中$λ$是电子-声子相互作用。

英文摘要:

Here the electron-phonon Holstein model with Rashba spin-orbit interaction is studied for a two dimensional square lattice in the adiabatic limit. It is demonstrated that a delocalized electron at zero spin-orbit coupling localizes into a large polaron state as soon as the Rashba term is nonzero. This spin-orbit induced polaron state has localization length inversely proportional to the Rashba coupling $γ$, and it dominates a wide region of the $γ$-$λ$ phase diagram, where $λ$ is the electron-phonon interaction.

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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