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arXiv 2008.13438cond-mat.mtrl-sciphysics.app-ph
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离子门控对1.5nm厚Pd膜自旋转换的调制

Modulation of spin conversion in a 1.5 nm-thick Pd film by ionic gating

Shin-ichiro Yoshitake, Ryo Ohshima, Teruya Shinjo, Yuichiro Ando, Masashi Shiraishi

摘要:

研究了在铁磁绝缘体上生长的1.5 nm厚Pd薄膜的自旋轨道相互作用(SOI)的栅诱导调制。通过离子门控的有效电荷积累使得Pd膜的费米能级能够大幅上移,这通过Pd中的电阻率的抑制来证实。在自旋泵浦下,由于Pd的自旋霍尔电导率的调制,由Pd中的逆自旋霍尔效应产生的电动势基本上被选通调制。使用薄Cu膜(其能带结构在很大程度上不同于Pd和Pt并且其SOI相当小)的相同实验提供了支持我们的权利要求的进一步结果。所获得的结果有助于在发展中的整体理解的栅极可调SOI固体,并确认了先前的解释的显着调制的自旋霍尔电导率在一个cnPt膜门控。

英文摘要:

Gate-induced modulation of the spin-orbit interaction (SOI) in a 1.5 nm-thick Pd thin film grown on a ferrimagnetic insulator was investigated. Efficient charge accumulation by ionic gating enables a substantial upshift in the Fermi level of the Pd film, which was corroborated by suppression of the resistivity in the Pd. Electromotive forces arising from the inverse spin Hall effect in Pd under spin pumping were substantially modulated by the gating, in consequence of the modulation of the spin Hall conductivity of Pd as in an ultrathin Pt film. The same experiment using a thin Cu film, for which the band structure is largely different from Pd and Pt and its SOI is quite small, provides further results supporting our claim. The results obtained help in developing a holistic understanding of the gate-tunable SOI in solids and confirm a previous explanation of the significant modulation of the spin Hall conductivity in an ultrathin Pt film by gating.

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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