Research paperExperimental CharacterizationComputational DFTCalculated Band StructureObservation of Transient Trion Induced by Ultrafast Charge Transfer in Graphene/MoS₂ HeterostructureChen Wang, Yu Chen, Qiushi Ma, Peng Suo et al.2024·10.1063/5.0244481·arXiv:2409.17752AbstractVan der Waals (Vdw) heterostructures constructed from TMDCs provide an ideal platform for exploring various quasiparticle behaviors, with trion—composed of neutral exciton and charged carrier—being a notable example. There are typically three methods to generate trion: electrical doping, chemical doping, and direct optical doping. The first two methods generate static trion, while the last gives rise to transient trion. Here, we present an indirect optical doping approach to generate transient trion via ultrafast charge transfer (CT) and achieve control over the trion-to-exciton ratio by adjusting CT in Gr/MoS₂ heterostructure. Furthermore, we demonstrated that dynamics of the transient trion generated with this method, which shows slightly longer lifetime than that of exciton accounted for the Coulomb interactions between trion and charged defect. This study provides fresh perspectives on the construction of new quasiparticles, dynamical characterization and the control of the many-body interaction in two-dimensional structure.Read more
Commercial graphene/MoS₂ van der Waals heterostructure field-effect transistor device on sapphire substrate with ionic-gel gating.3 characterizations5 properties2 figuresExperimentalCStudied MaterialMoS₂Studied MaterialExpand
Research paperExperimental CharacterizationComputational DFTCalculated Band StructureObservation of Transient Trion Induced by Ultrafast Charge Transfer in Graphene/MoS₂ HeterostructureChen Wang, Yu Chen, Qiushi Ma, Peng Suo et al.2024·10.1063/5.0244481·arXiv:2409.17752AbstractVan der Waals (Vdw) heterostructures constructed from TMDCs provide an ideal platform for exploring various quasiparticle behaviors, with trion—composed of neutral exciton and charged carrier—being a notable example. There are typically three methods to generate trion: electrical doping, chemical doping, and direct optical doping. The first two methods generate static trion, while the last gives rise to transient trion. Here, we present an indirect optical doping approach to generate transient trion via ultrafast charge transfer (CT) and achieve control over the trion-to-exciton ratio by adjusting CT in Gr/MoS₂ heterostructure. Furthermore, we demonstrated that dynamics of the transient trion generated with this method, which shows slightly longer lifetime than that of exciton accounted for the Coulomb interactions between trion and charged defect. This study provides fresh perspectives on the construction of new quasiparticles, dynamical characterization and the control of the many-body interaction in two-dimensional structure.Read more
Commercial graphene/MoS₂ van der Waals heterostructure field-effect transistor device on sapphire substrate with ionic-gel gating.3 characterizations5 properties2 figuresExperimentalCStudied MaterialMoS₂Studied MaterialExpand
Research paperExperimental CharacterizationComputational DFTCalculated Band StructureObservation of Transient Trion Induced by Ultrafast Charge Transfer in Graphene/MoS₂ HeterostructureChen Wang, Yu Chen, Qiushi Ma, Peng Suo et al.2024·10.1063/5.0244481·arXiv:2409.17752AbstractVan der Waals (Vdw) heterostructures constructed from TMDCs provide an ideal platform for exploring various quasiparticle behaviors, with trion—composed of neutral exciton and charged carrier—being a notable example. There are typically three methods to generate trion: electrical doping, chemical doping, and direct optical doping. The first two methods generate static trion, while the last gives rise to transient trion. Here, we present an indirect optical doping approach to generate transient trion via ultrafast charge transfer (CT) and achieve control over the trion-to-exciton ratio by adjusting CT in Gr/MoS₂ heterostructure. Furthermore, we demonstrated that dynamics of the transient trion generated with this method, which shows slightly longer lifetime than that of exciton accounted for the Coulomb interactions between trion and charged defect. This study provides fresh perspectives on the construction of new quasiparticles, dynamical characterization and the control of the many-body interaction in two-dimensional structure.Read more
Commercial graphene/MoS₂ van der Waals heterostructure field-effect transistor device on sapphire substrate with ionic-gel gating.3 characterizations5 properties2 figuresExperimentalCStudied MaterialMoS₂Studied MaterialExpand
Research paperExperimental CharacterizationComputational DFTCalculated Band StructureObservation of Transient Trion Induced by Ultrafast Charge Transfer in Graphene/MoS₂ HeterostructureChen Wang, Yu Chen, Qiushi Ma, Peng Suo et al.2024·10.1063/5.0244481·arXiv:2409.17752AbstractVan der Waals (Vdw) heterostructures constructed from TMDCs provide an ideal platform for exploring various quasiparticle behaviors, with trion—composed of neutral exciton and charged carrier—being a notable example. There are typically three methods to generate trion: electrical doping, chemical doping, and direct optical doping. The first two methods generate static trion, while the last gives rise to transient trion. Here, we present an indirect optical doping approach to generate transient trion via ultrafast charge transfer (CT) and achieve control over the trion-to-exciton ratio by adjusting CT in Gr/MoS₂ heterostructure. Furthermore, we demonstrated that dynamics of the transient trion generated with this method, which shows slightly longer lifetime than that of exciton accounted for the Coulomb interactions between trion and charged defect. This study provides fresh perspectives on the construction of new quasiparticles, dynamical characterization and the control of the many-body interaction in two-dimensional structure.Read more
Commercial graphene/MoS₂ van der Waals heterostructure field-effect transistor device on sapphire substrate with ionic-gel gating.3 characterizations5 properties2 figuresExperimentalCStudied MaterialMoS₂Studied MaterialExpand