Van der Waals interactions with transition metal dichalcogenides were shown to induce strong spin-orbit coupling (SOC) in graphene, offering great promises to combine large experimental flexibility of graphene with unique tuning capabilities of the SOC. Here, we probe SOC-driven band splitting and electron dynamics in graphene on WSe₂ by measuring ballistic transverse magnetic focusing. We found a clear splitting in the first focusing peak whose evolution in charge density and magnetic field is well reproduced by calculations using the SOC strength of ~ 13 meV, and no splitting in the second peak that indicates stronger Rashba SOC. Possible suppression of electron-electron scatterings was found in temperature dependence measurement. Further, we found that Shubnikov-de Haas oscillations exhibit a weaker band splitting, suggesting that it probes different electron dynamics, calling for a new theory. Our study demonstrates an interesting possibility to exploit ballistic electron motion pronounced in graphene for emerging spin-orbitronics.

范德华与过渡金属二硫属化物的相互作用被证明可以在石墨烯中诱导强自旋轨道耦合（SOC），这为将石墨烯的巨大实验灵活性与 SOC 独特的调谐能力相结合提供了巨大的希望。_{在这里，我们通过测量弹道横向磁聚焦来探测 WSe 2}上石墨烯中 SOC 驱动的能带分裂和电子动力学。我们发现第一个聚焦峰中有明显的分裂，通过使用约 13 meV 的 SOC 强度的计算可以很好地再现其电荷密度和磁场的演变，而第二个峰中没有分裂，这表明 Rashba SOC 更强。在温度依赖性测量中发现了电子-电子散射的可能抑制。此外，我们发现舒布尼科夫-德哈斯振荡表现出较弱的能带分裂，这表明它探测了不同的电子动力学，需要新的理论。我们的研究证明了利用石墨烯中明显的弹道电子运动来实现新兴自旋轨道电子学的有趣可能性。