The Raman activeGmode in graphene exhibits a strong coupling to electrons,yet the comprehensive treatment of this interaction in the calculation of its temperature-dependent Raman spectrumremains incomplete.In this st...The Raman activeGmode in graphene exhibits a strong coupling to electrons,yet the comprehensive treatment of this interaction in the calculation of its temperature-dependent Raman spectrumremains incomplete.In this study,we calculate the temperature dependence of the G-mode frequency and linewidth,and successfully explain the experimental trend by accounting for the contributions arising from the first-order electron-phonon coupling,electron-mediated phonon-phonon coupling,and standard lattice anharmonicity.The generality of our approach enables its broad applicability to study phonon dynamics in materials where both electron-phonon coupling and anharmonicity are important.展开更多
基金support from the Croatian Science Foundation(Grant no.UIP-2019-04-6869 and UIP-2020-02-5675)from the European Regional Development Fund for the"Center of Excellence for Advanced Materials and Sensing Devices"(Grant No.KK.01.1.1.01.0001)+6 种基金as well as from the project"Podizanje znanstvene izvrsnosti Centra za napredne laserske tehnike(CALTboost)"financed by the European Union through the National Recovery and Resilience Plan 2021-2026(NRPP)J.P.B.,A.C.,and M.J.V.acknowledge computing time from a PRACE award granting access to Discoverer at SofiaTech in Bulgaria(OptoSpin project id.2020225411)EuroHPC(Extreme grant EHPC-EXT-2023E02-050)on Marenostrum5 at BSC,Spain,by the CECI(FRS-FNRS Belgium Grant No.2.5020.11)the Lucia Tier-1 of the Fédération Wallonie-Bruxelles(Walloon)support from ARC project DREAMS(G.A.21/25-11)funded by Federation Wallonie Bruxelles and ULiegethe EUSpecLab MSCA DTN network funded by EU Horizon Europe(G.A.101073486)the Excellence of Science project CONNECT(G.A.40007563)funded by FWO and FNRS.
文摘The Raman activeGmode in graphene exhibits a strong coupling to electrons,yet the comprehensive treatment of this interaction in the calculation of its temperature-dependent Raman spectrumremains incomplete.In this study,we calculate the temperature dependence of the G-mode frequency and linewidth,and successfully explain the experimental trend by accounting for the contributions arising from the first-order electron-phonon coupling,electron-mediated phonon-phonon coupling,and standard lattice anharmonicity.The generality of our approach enables its broad applicability to study phonon dynamics in materials where both electron-phonon coupling and anharmonicity are important.
