Research paperExperimental CharacterizationTheoreticalUltrafast Band-Gap Renormalization in Bilayer GrapheneEduard Moos, Zhi-Yuan Deng, Hauke Beyer, Arpit Jain et al.arXiv preprint·2026·arXiv:2602.18065AbstractWe demonstrate, by femtosecond time- and angle-resolved photoemission spectroscopy, that photoinduced interlayer charge transfer in a heterostructure consisting of Bernal-stacked bilayer graphene and a single atomic layer of silver on 6H-SiC(0001) transiently modulates the intrinsic potential landscape across the silver–graphene interface. This acts as an ultrafast optoelectronic gate that drives momentum-dependent band renormalizations, resulting in a transient band-gap opening on femtosecond timescales. Simultaneously, the photogenerated hot-carrier population enhances electronic screening, leading to subsequent closing of the band-gap beyond the thermal equilibrium value.Read more
Bernal-stacked bilayer graphene on monolayer silver intercalated on 6H-SiC(0001), studied by tr-ARPES.1 characterization11 properties4 figuresExperimentalCStudied MaterialAgStudied MaterialSiCSubstrate / DielectricExpand
Reference heterostructure of monolayer graphene on monolayer silver intercalated on 6H-SiC(0001).1 characterization2 figuresCReference MaterialAgStudied MaterialSiCSubstrate / DielectricExpand
Research paperExperimental CharacterizationTheoreticalUltrafast Band-Gap Renormalization in Bilayer GrapheneEduard Moos, Zhi-Yuan Deng, Hauke Beyer, Arpit Jain et al.arXiv preprint·2026·arXiv:2602.18065AbstractWe demonstrate, by femtosecond time- and angle-resolved photoemission spectroscopy, that photoinduced interlayer charge transfer in a heterostructure consisting of Bernal-stacked bilayer graphene and a single atomic layer of silver on 6H-SiC(0001) transiently modulates the intrinsic potential landscape across the silver–graphene interface. This acts as an ultrafast optoelectronic gate that drives momentum-dependent band renormalizations, resulting in a transient band-gap opening on femtosecond timescales. Simultaneously, the photogenerated hot-carrier population enhances electronic screening, leading to subsequent closing of the band-gap beyond the thermal equilibrium value.Read more
Bernal-stacked bilayer graphene on monolayer silver intercalated on 6H-SiC(0001), studied by tr-ARPES.1 characterization11 properties4 figuresExperimentalCStudied MaterialAgStudied MaterialSiCSubstrate / DielectricExpand
Reference heterostructure of monolayer graphene on monolayer silver intercalated on 6H-SiC(0001).1 characterization2 figuresCReference MaterialAgStudied MaterialSiCSubstrate / DielectricExpand
Research paperExperimental CharacterizationTheoreticalUltrafast Band-Gap Renormalization in Bilayer GrapheneEduard Moos, Zhi-Yuan Deng, Hauke Beyer, Arpit Jain et al.arXiv preprint·2026·arXiv:2602.18065AbstractWe demonstrate, by femtosecond time- and angle-resolved photoemission spectroscopy, that photoinduced interlayer charge transfer in a heterostructure consisting of Bernal-stacked bilayer graphene and a single atomic layer of silver on 6H-SiC(0001) transiently modulates the intrinsic potential landscape across the silver–graphene interface. This acts as an ultrafast optoelectronic gate that drives momentum-dependent band renormalizations, resulting in a transient band-gap opening on femtosecond timescales. Simultaneously, the photogenerated hot-carrier population enhances electronic screening, leading to subsequent closing of the band-gap beyond the thermal equilibrium value.Read more
Bernal-stacked bilayer graphene on monolayer silver intercalated on 6H-SiC(0001), studied by tr-ARPES.1 characterization11 properties4 figuresExperimentalCStudied MaterialAgStudied MaterialSiCSubstrate / DielectricExpand
Reference heterostructure of monolayer graphene on monolayer silver intercalated on 6H-SiC(0001).1 characterization2 figuresCReference MaterialAgStudied MaterialSiCSubstrate / DielectricExpand
Research paperExperimental CharacterizationTheoreticalUltrafast Band-Gap Renormalization in Bilayer GrapheneEduard Moos, Zhi-Yuan Deng, Hauke Beyer, Arpit Jain et al.arXiv preprint·2026·arXiv:2602.18065AbstractWe demonstrate, by femtosecond time- and angle-resolved photoemission spectroscopy, that photoinduced interlayer charge transfer in a heterostructure consisting of Bernal-stacked bilayer graphene and a single atomic layer of silver on 6H-SiC(0001) transiently modulates the intrinsic potential landscape across the silver–graphene interface. This acts as an ultrafast optoelectronic gate that drives momentum-dependent band renormalizations, resulting in a transient band-gap opening on femtosecond timescales. Simultaneously, the photogenerated hot-carrier population enhances electronic screening, leading to subsequent closing of the band-gap beyond the thermal equilibrium value.Read more
Bernal-stacked bilayer graphene on monolayer silver intercalated on 6H-SiC(0001), studied by tr-ARPES.1 characterization11 properties4 figuresExperimentalCStudied MaterialAgStudied MaterialSiCSubstrate / DielectricExpand
Reference heterostructure of monolayer graphene on monolayer silver intercalated on 6H-SiC(0001).1 characterization2 figuresCReference MaterialAgStudied MaterialSiCSubstrate / DielectricExpand