Terahertz and Optical Spintronics in Ferro- and Antiferromagnets

Datum

25.01.2022

Zeit

14:50 - 16:20

Sprecher

Lukáš Nádvorník

Zugehörigkeit

Charles University, Prague

Sprache

en

Hauptthema

Physik

Andere Themen

Physik

Host

D. Peets

Beschreibung

Abstract:

After the recent progress in fields of ultrafast demagnetization [1] and intense terahertz (THz) sources [2], the THz spectroscopy has found its way to explore ultrafast spintronic phenomena. By covering energies from 0.4 to 200 meV, it complements optical pump-probe techniques by resonant probing of various excitations in solid states, such as electron scattering rate, spin-orbit interaction or antiferromagnetic resonance.

In this talk, we will show how time-resolved THz and optical spectroscopy can provide new insight into well established spintronic phenomena like anisotropic magnetoresistance [3], ultrafast demagnetization, or spin Hall [4] and Seebeck effects [5], as well as the recently observed opto-electrical recording into antiferromagnetic metal CuMnAs [6].

[1] T. Seifert et al., Nature Phot. 10, 483 (2016).

[2] P. Němec et al., Nature Physics 14, 229 (2018).

[3] L. Nádvorník et al., Phys. Rev. X 11, 021030 (2021).

[4] O. Gueckstock, et al., Adv. Mater. 33, 2006281 (2021).

[5] T. Seifert et al., Nature Communications 9, 2899 (2018).

[6] Z. Kašpar et al., Nature Nanoelectronics 10, 1038 (2020).

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Letztmalig verändert: 25.01.2022, 00:10:27