Study of intrinsic spin and orbital hall effects in pt based on a (6s, 6p, 5d) tight-binding model
Study of intrinsic spin and orbital hall effects in pt based on a (6s, 6p, 5d) tight-binding model
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DOI：
10.1143/jpsj.76.103702
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发表时间：
2007-10-01
影响因子：
1.7
通讯作者：
Inoce, Jun-Ichiro
中科院分区：
文献类型：
--
作者：
Kontani, Hiroshi;Naito, Masayuki;Inoce, Jun-Ichiro
我们基于具有自旋轨道相互作用的多轨道紧束缚模型，研究了 Pt 中本征自旋霍尔电导率 (SHC) 和 d 轨道霍尔电导率 (OHC) 的起源。我们发现，当电阻率p小于10μΩ·cm时，SHC超过1000he(-1)·Ω(-1)·cm(-1)，而当rho接近100μΩ·cm时，SHC下降至300he(-1)·Ω(-1)·cm(-1)。另外，OHC仍然比SHC大。 Pt中巨大的自旋霍尔效应（SHE）和d轨道霍尔效应（OHE）的起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诱发的“有效阿哈罗诺夫-玻姆相”。
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 exceeds 1000he(-1) .Omega(-1) cm(-1) when the resistivity p is smaller than similar to 10 mu Omega cm, whereas it decreases to 300 he(-1) .Omega(-1) cm(-1) when rho similar to 100 mu Omega cm. In addition, the OHC is still larger than the SHC. The origin of the huge spin Hall effect (SHE) and d-orbital Hall effect (OHE) in Pt is the "effective Aharonov-Bohm phase" that is induced by the interorbital transition between d(xy)- and d(x2-y2)-orbitals with the aid of the strong spin-orbit interaction.