Origin of helicity-dependent photoconductivity in magnetic and nonmagnetic wires

Autor:	Atul Pandey, Rouven Dreyer, Palvan Seyidov, Chris Koerner, Saban Tirpanci, Binoy Krishna Hazra, Stuart Parkin, Georg Woltersdorf
Rok vydání:	2022
Zdroj:	Physical Review B
ISSN:	2469-9969 2469-9950
Popis:	We study the opto-electric response in metallic wire structures. The aim is to understand the origin of helicity-dependent photoconductivity. For nonmagnetic metals this effect is generally believed to probe spin polarization. Using magnetic wires we show that this method enables background free imaging of spin textures. Analyzing the physical origin we find that the circular dichroism slightly modulates the absorption. The corresponding thermal modulation explains the measured electrical signals. We apply this result to examine the spin Hall effect induced spin accumulation in heavy metals. Here, we show that previously reported results in nonmagnetic wires are well reproducible, but not related to the spin polarization.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0695d19bc2db51f7350bc42e7eda09f9 https://doi.org/10.1103/physrevb.106.174420 Zobrazit plný text záznamu