arXiv Open Access 2022

The Giant Spin Hall Effect at Optical Frequencies

P. Elliott S. Shallcross Sangeeta Sharma

Lihat Sumber

Abstrak

We generalize the spin Hall angle to laser pulses of finite frequencies in the linear response regime and predict a giant optical spin Hall effect. Namely, for certain transition metal elements, at particular frequencies, the spin current can be a significant fraction of the charge current, and even exceed it for XUV frequencies. By maximizing spin current while minimizing the charge current, we thus minimize a major source of heating in spintronic devices. We employ {\it ab-initio} time-dependent density functional theory (TDDFT), and with real-time simulations calculate the conductivity and transverse spin conductivity for all $3$d, $4$d, and $5$d transition metals for frequencies up to $50$ eV. In the XUV frequency range we find values greater than $1$ for the spin Hall angle, indicating spin currents larger than the charge current can be generated.

Topik & Kata Kunci

cond-mat.mes-hall cond-mat.mtrl-sci

Penulis (3)

P. Elliott

S. Shallcross

Sangeeta Sharma

Format Sitasi

APA MLA BibTeX

Elliott, P., Shallcross, S., Sharma, S. (2022). The Giant Spin Hall Effect at Optical Frequencies. https://arxiv.org/abs/2204.01538

Akses Cepat

Lihat di Sumber

Informasi Jurnal

Tahun Terbit: 2022
Bahasa: en
Sumber Database: arXiv
Akses: Open Access ✓