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arXiv 0705.3535cond-mat.mes-hallcond-mat.str-el
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基于(6s,6p,5d)紧束缚模型研究Pt的内禀自旋和轨道霍尔效应

Study of intrinsic spin and orbital Hall effects in Pt based on a (6s, 6p, 5d) tight-binding model

H. Kontani, M. Naito, D. S. Hirashima, K. Yamada, J. Inoue

摘要:

基于自旋-轨道相互作用的多轨道紧束缚模型,研究了Pt的本征自旋霍尔电导(SHC)和d轨道霍尔电导(OHC)的起源。当电阻率ρ小于~10 μΩcm时,SHC达到1000 \hbar /eΩcm,当电阻率ρ~ 100 μΩcm时,SHC降至300 \hbar/e Ωcm。此外,OHC仍然大于SHC。Pt中巨大的SHE和OHE的来源是在强自旋轨道相互作用的帮助下,d_{xy} -和d_{x2-y2} -轨道之间的轨道间跃迁引起的大的“有效磁通量”。

英文摘要:

We study the origin of the intrinsic spin Hall conductivity (SHC) and the d-orbital Hall conductivity (OHC) in Pt based on a multiorbital tight-binding model with spin-orbit interaction. We find that the SHC reaches 1000 \hbar/eΩcm when the resistivity ρis smaller than ~10 μΩcm, whereas it decreases to 300 \hbar/eΩcm when ρ~ 100 μΩcm. In addition, the OHC is still larger than the SHC. The origin of huge SHE and OHE in Pt is the large ``effective magnetic flux'' that is induced by the interorbital transition between d_{xy}- and d_{x2-y2}-orbitals with the aid of the strong spin-orbit 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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