biostudies-literatureGerber JDCore Research for Evolutional Science and TechnologySwiss National Science FoundationEuropean Research CouncilDeutsche ForschungsgemeinschaftMinistry of Education, Culture, Sports, Science and TechnologyUniversit?t RegensburgGraphene FlagshipJapan Society for the Promotion of Science12480-12486https://www.ebi.ac.uk/biostudies/studies/S-EPMC12371879biostudies-literatureUnknown25(33)Bilayer graphene (BLG)-based quantum devices represent a promising platform for emerging technologies, such as quantum computing and spintronics. However, their intrinsically weak spin-orbit coupling (SOC) complicates spin and valley manipulation. Integrating BLG with transition metal dichalcogenides (TMDs) enhances the SOC via proximity effects. While this enhancement has been demonstrated in 2D-layered structures, 1D and 0D nanostructures in BLG/TMD remain unrealized, with open questions regarding SOC strength and tunability. Here, we investigate quantum point contacts and quantum dots in two BLG/WSe₂ heterostructures with different stacking orders. Across multiple devices, we reproducibly demonstrate spin-orbit splitting up to 1.5 meV─more than 1 order of magnitude higher than in pristine BLG. Furthermore, we show that the induced SOC can be tuned in situ from its maximum value to near-complete suppression via the perpendicular electric field. This enhancement and in situ tunability establish the SOC as a control mechanism for dynamic spin and valley manipulation.Nano lettersTunable Spin-Orbit Splitting in Bilayer Graphene/WSe<sub>2</sub> Quantum Devices.PMC1237187921H05233SFB 1277 - 31469503223H02052KN 1383/795154KN 1383/4JPMJCR24A5Huang WWKnothe AMasseroni MGerber JDErsoy ELaumer MAdam CTaniguchi TDuprez HDenisov AOTong CEnsslin KFal'ko VIIhn TOstertag LWatanabe KNiese MfalseTunable Spin-Orbit Splitting in Bilayer Graphene/WSe<sub>2</sub> Quantum Devices.Bilayer graphene (BLG)-based quantum devices represent a promising platform for emerging technologies, such as quantum computing and spintronics. However, their intrinsically weak spin-orbit coupling (SOC) complicates spin and valley manipulation. Integrating BLG with transition metal dichalcogenides (TMDs) enhances the SOC via proximity effects. While this enhancement has been demonstrated in 2D-layered structures, 1D and 0D nanostructures in BLG/TMD remain unrealized, with open questions regarding SOC strength and tunability. Here, we investigate quantum point contacts and quantum dots in two BLG/WSe₂ heterostructures with different stacking orders. Across multiple devices, we reproducibly demonstrate spin-orbit splitting up to 1.5 meV─more than 1 order of magnitude higher than in pristine BLG. Furthermore, we show that the induced SOC can be tuned in situ from its maximum value to near-complete suppression via the perpendicular electric field. This enhancement and in situ tunability establish the SOC as a control mechanism for dynamic spin and valley manipulation.2025-01-01T00:00:00Z2025 Aug2026-05-09T10:38:11.798Z2026-04-08T00:48:29.573ZS-EPMC123718794077337610.1021/acs.nanolett.5c02309