Momentum-resolved view of highly tunable many-body effects in a graphene/hBN field-effect device

Abstract

Integrating the carrier tunability of a functional two-dimensional material electronic device with a direct probe of energy- and momentum-resolved electronic excitations is essential to gain insights on how many-body interactions are influenced during device operation. Here, we use micro-focused angle-resolved photoemission in order to analyze many-body interactions in back-gated graphene supported on hexagonal boron nitride. By extracting the doping-dependent quasiparticle dispersion and self-energy, we observe how these interactions renormalize the Dirac cone and impact the electron mobility of our device. Our results are not only limited to a finite energy range around the Fermi level, as in electron transport measurements, but describe interactions on a much wider energy scale, extending beyond the regime of hot carrier excitations.

arXiv comment6 pages, 3 figures

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Cited by in corpus (14)

• Angle-resolved photoemission spectroscopy
• Observation of Electrically Tunable van Hove Singularities in Twisted Bilayer Graphene from nanoARPES
• Accessing the spectral function of in operando devices by angle-resolved photoemission spectroscopy
• Accessing the spectral function in a current-carrying device
• Correlation-Driven Electron-Hole Asymmetry in Graphene Field Effect Devices
• ARPES signatures of few-layer twistronic graphenes
• Roadmap on Quantum Magnetic Materials
• Revealing flat bands and hybridization gaps in a twisted bilayer graphene device with microARPES
• Experimental evidence of plasmarons and effective fine structure constant in electron-doped graphene/h-BN heterostructure
• Nanoscale view of engineered massive Dirac quasiparticles in lithographic superstructures
• Autonomous microARPES
• Electronic structure of 2D van der Waals crystals and heterostructures investigated by spatially- and angle-resolved photoemission
• Sub-tesla on-chip nanomagnetic metamaterial platform for angle-resolved photoemission spectroscopy
• Direct visualization of gate-tunable flat bands in twisted double bilayer graphene