TY  - JOUR
AU  - Ghosh, Sumit
AU  - Freimuth, Frank
AU  - Gomonay, Olena
AU  - Blügel, Stefan
AU  - Mokrousov, Yuriy
TI  - Driving spin chirality by electron dynamics in laser-excited antiferromagnets
JO  - Communications Physics
VL  - 5
IS  - 1
SN  - 2399-3650
CY  - London
PB  - Springer Nature
M1  - FZJ-2022-01843
SP  - 69
PY  - 2022
AB  - Despite recent successes in the area of ultrafast manipulation of magnetic order, optical generation and manipulation of complex spin textures is hindered by an insufficient theoretical understanding of underlying processes. In particular an important aspect of subtle connection between the electronic and magnetic degrees of freedom is not properly accounted for in existing theories. Here, we uncover a distinct physical mechanism for imprinting spin chirality into collinear magnets with short laser pulses. By simultaneously treating the laser-ignited evolution of electronic structure and magnetic order, we show that their intertwined dynamics can result in an emergence of quasi-stable chiral states. We find that laser-driven chirality does not require any auxiliary external fields or intrinsic spin–orbit interaction to exist, and it can survive on the time scale of nanoseconds even in the presence of thermal fluctuations, which makes the uncovered mechanism relevant for understanding various optical experiments on magnetic materials. Our findings provide a more detailed perspective of the complex interactions which occur between chiral magnetism and light.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000773257500001
DO  - DOI:10.1038/s42005-022-00840-3
UR  - https://juser.fz-juelich.de/record/907112
ER  -