Spin Injection and Emission Helicity Switching in a 2D Perovskite/WSe 2 Heterostructure
Year: 2026
Type: article
Abstract: The ability to initialize and control long-lived spin populations in lead halide perovskites is essential to enable their use in spintronics technologies. Here, we show that the interlayer exciton observed in the photoluminescence spectrum of a (BA) 2 PbI 4 /WSe 2 monolayer heterostructure below the intralayer exciton transitions exhibits circular dichroism, whose sign can be modulated by tuning the excitation energy. Equilibrium and transient absorption measurements reveal an additional absorptive feature between the A and B excitons of WSe 2 with hybrid character. This resonance arises from hybridized valence band states of the two materials and plays a key role in controlling the helicity of the interlayer exciton emission. The tunable spin polarization demonstrated here, with the WSe 2 monolayer effectively acting as a tunable spin filter, represents an important step toward the use of 2D perovskites in opto-spintronics applications.
Source: Nano Letters
Authors: Jakub Jasiński, Francesco Gucci, Thomas Brumme, Swaroop Palai, Armando Genco, Alessandro Baserga, Jonas D. Ziegler, Takashi Taniguchi, Kenji Watanabe, Mateusz Dyksik, Christoph Gadermaier, Michał Baranowski, Duncan K. Maude, Alexey Chernikov, Giulio Cerullo, Agnieszka Kuc, Stefano Dal Conte, Paulina Plochocka, Alessandro Surrente
Institutions: Wrocław University of Science and Technology, Centre National de la Recherche Scientifique, Université Toulouse III - Paul Sabatier, Institut National des Sciences Appliquées de Toulouse, Laboratoire National des Champs Magnétiques Intenses, Complexity, Topology and Dynamics in Quantum Matter, Université de Toulouse, Technische Universität Dresden, Université Grenoble Alpes, Politecnico di Milano, National Institute for Materials Science, Helmholtz-Zentrum Dresden-Rossendorf, Center for Advanced Systems Understanding
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $4,500
Funders: Laserlab-Europe, European Commission, Deutsche Forschungsgemeinschaft, Agence Nationale de la Recherche, Ministry of Education, Culture, Sports, Science and Technology, Narodowe Centrum Nauki, Narodowym Centrum Nauki, Campus France, Narodowa Agencja Wymiany Akademickiej, Japan Society for the Promotion of Science, Japan Science and Technology Agency, Core Research for Evolutional Science and Technology, H2020 Marie Skłodowska-Curie Actions, H2020 Research Infrastructures, NextGenerationEU
Awards: G1323218498, Quantengase in Moirégeordneten und rekonstruierten Heterostrukturen: Effektive Dimensionalitäten, Hybridzustände und Wechselwirkungen, The Integrated Initiative of European Laser Research Infrastructures, G1848291633, G1957822890, G2152757567, G2252533788, G2442584775, SFB 1415: Chemie der synthetischen zweidimensionalen Materialien, G2460755258, G2659019386, G319476881, G3269556148, G3294224867, G3385661826, G3421442083, G3457266600, The Integrated Initiative of European Laser Research Infrastructures, G4064882676, G4091144171, G4129145046, G4162329948, G42699959, G4303546637, G4806815962, G5109240897, Developing optoelectronics in two-dimensional semiconductors, G5381074597, Developing optoelectronics in two-dimensional semiconductors, EXC 2147: Komplexität und Topologie in Quantenmaterialien (CT.QMAT), G675428594, G6803667113, G708600390, G7118201441, G7455520032, G7486974924, G7621391830, G7842812455, Magnetische van der Waals Heterostrukturen, G7991396958, Science et Ingénierie à l'Echelle Nano, G898758523
OpenAlex ID: W7148878098