凝聚态物理
自旋电子学
三极管
反铁磁性
激子
材料科学
光致发光
范德瓦尔斯力
异质结
磁性半导体
半导体
磁场
单层
铁磁性
纳米技术
物理
化学
光电子学
量子力学
分子
有机化学
作者
Caique Serati de Brito,Paulo E. Faria,Talieh S. Ghiasi,Josep Ingla‐Aynés,Cesar Rabahi,Camila Cavalini,Florian Dirnberger,Samuel Mañas‐Valero,Kenji Watanabe,Takashi Taniguchi,Klaus Zollner,Jaroslav Fabian,Christian Schüller,Herre S. J. van der Zant,Y. Galvão Gobato
出处
期刊:Nano Letters
[American Chemical Society]
日期:2023-11-29
卷期号:23 (23): 11073-11081
标识
DOI:10.1021/acs.nanolett.3c03431
摘要
van der Waals heterostructures composed of two-dimensional (2D) transition metal dichalcogenides and vdW magnetic materials offer an intriguing platform to functionalize valley and excitonic properties in nonmagnetic TMDs. Here, we report magneto photoluminescence (PL) investigations of monolayer (ML) MoSe2 on the layered A-type antiferromagnetic (AFM) semiconductor CrSBr under different magnetic field orientations. Our results reveal a clear influence of the CrSBr magnetic order on the optical properties of MoSe2, such as an anomalous linear-polarization dependence, changes of the exciton/trion energies, a magnetic-field dependence of the PL intensities, and a valley g-factor with signatures of an asymmetric magnetic proximity interaction. Furthermore, first-principles calculations suggest that MoSe2/CrSBr forms a broken-gap (type-III) band alignment, facilitating charge transfer processes. The work establishes that antiferromagnetic-nonmagnetic interfaces can be used to control the valley and excitonic properties of TMDs, relevant for the development of opto-spintronics devices.
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