TY - JOUR
T1 - Proximity-Induced Exchange Interaction and Prolonged Valley Lifetime in MoSe2/CrSBr Van-Der-Waals Heterostructure with Orthogonal Spin Textures
AU - Beer, Andreas
AU - Zollner, Klaus
AU - Serati de Brito, Caique
AU - Faria Junior, Paulo E.
AU - Parzefall, Philipp
AU - Ghiasi, Talieh S.
AU - Ingla-Aynés, Josep
AU - van der Zant, Herre S.J.
AU - Schüller, Christian
AU - More Authors, null
PY - 2024
Y1 - 2024
N2 - Heterostructures, composed of semiconducting transition-metal dichalcogenides (TMDC) and magnetic van-der-Waals materials, offer exciting prospects for the manipulation of the TMDC valley properties via proximity interaction with the magnetic material. We show that the atomic proximity of monolayer MoSe2 and the antiferromagnetic van-der-Waals crystal CrSBr leads to an unexpected breaking of time-reversal symmetry, with originally perpendicular spin directions in both materials. The observed effect can be traced back to a proximity-induced exchange interaction via first-principles calculations. The resulting spin splitting in MoSe2 is determined experimentally and theoretically to be on the order of a few meV. Moreover, we find a more than 2 orders of magnitude longer valley lifetime of spin-polarized charge carriers in the heterostructure, as compared to monolayer MoSe2/SiO2, driven by a Mott transition in the type-III band-aligned heterostructure.
AB - Heterostructures, composed of semiconducting transition-metal dichalcogenides (TMDC) and magnetic van-der-Waals materials, offer exciting prospects for the manipulation of the TMDC valley properties via proximity interaction with the magnetic material. We show that the atomic proximity of monolayer MoSe2 and the antiferromagnetic van-der-Waals crystal CrSBr leads to an unexpected breaking of time-reversal symmetry, with originally perpendicular spin directions in both materials. The observed effect can be traced back to a proximity-induced exchange interaction via first-principles calculations. The resulting spin splitting in MoSe2 is determined experimentally and theoretically to be on the order of a few meV. Moreover, we find a more than 2 orders of magnitude longer valley lifetime of spin-polarized charge carriers in the heterostructure, as compared to monolayer MoSe2/SiO2, driven by a Mott transition in the type-III band-aligned heterostructure.
KW - optical spectroscopy
KW - time-resolved Kerr rotation
KW - transition metal dichalcogenides
KW - two-dimensional magnets
KW - van der Waals heterostructures
UR - http://www.scopus.com/inward/record.url?scp=85208805624&partnerID=8YFLogxK
U2 - 10.1021/acsnano.4c07336
DO - 10.1021/acsnano.4c07336
M3 - Article
AN - SCOPUS:85208805624
SN - 1936-0851
VL - 18
SP - 31044
EP - 31054
JO - ACS Nano
JF - ACS Nano
IS - 45
ER -