TY  - JOUR
AU  - Samanta, Kartik
AU  - Lezaic, Marjana
AU  - Merte, Maximilian
AU  - Freimuth, Frank
AU  - Blügel, Stefan
AU  - Mokrousov, Yuriy
TI  - Crystal Hall and crystal magneto-optical effect in thin films of SrRuO 3
JO  - Journal of applied physics
VL  - 127
IS  - 21
SN  - 1089-7550
CY  - Melville, NY
PB  - American Inst. of Physics
M1  - FZJ-2020-02647
SP  - 213904
PY  - 2020
AB  - Motivated by the recently observed topological Hall effect in ultra-thin films of SrRuO3 (SRO) grown on the SrTiO3 [001] substrate, we investigate the magnetic ground state and anomalous Hall response of the SRO ultra-thin films by virtue of spin density functional theory (DFT). Our findings reveal that in the monolayer limit of an SRO film, a large energy splitting of Ru-t2g states stabilizes an anti-ferromagnetic (AFM) insulating magnetic ground state. For the AFM ground state, our Berry curvature calculations predict a large anomalous Hall response upon doping. From the systematic symmetry analysis, we uncover that the large anomalous Hall effect arises due to a combination of broken time-reversal and crystal symmetries caused by the arrangement of non-magnetic atoms (Sr and O) in the SRO monolayer. We identify the emergent Hall effect as a clear manifestation of the so-called crystal Hall effect in terminology of Šmejkal et al., Crystal Hall effect in collinear antiferromagnets (2019), and demonstrate that it persists at finite frequencies, which is the manifestation of the crystal magneto-optical effect. Moreover, we find a colossal dependence of the anomalous Hall effect on the degree of crystal symmetry breaking also in ferromagnetic SRO films, which all together points to an alternative explanation of the emergence of the topological Hall effect observed in this type of systems.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000540686700001
DO  - DOI:10.1063/5.0005017
UR  - https://juser.fz-juelich.de/record/878129
ER  -