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Tuning many-body interactions in graphene: The effects of doping on excitons and carrier lifetimes
Kin Fai Mak, Felipe H. da Jornada, Keliang He +6
The optical properties of graphene are strongly affected by electron-electron (e-e) and electron-hole (e-h) interactions. Here we tune these many-body interactions through varying…
Systematic Determination of Absolute Absorption Cross-section of Individual Carbon Nanotubes
Kaihui Liu, Xiaoping Hong, Sangkook Choi +9
Determination of optical absorption cross-section is always among the central importance of understanding a material. However its realization on individual nanostructures, such as…
Optical Spectrum of MoS: Many-body Effects and Diversity of Exciton States
Diana Y. Qiu, Felipe H. da Jornada, Steven G. Louie
We present first-principles calculations of the optical response of monolayer molybdenum disulfide employing the GW-Bethe Salpeter equation (GW-BSE) approach including self-energy,…
Atomically perfect torn graphene edges and their reversible reconstruction
Kwanpyo Kim, Sinisa Coh, C. Kisielowski +4
The atomic structure of graphene edges is critical in determining the electrical, magnetic, and chemical properties of truncated graphene structures, notably nanoribbons. Unfortuna…
Intermolecular interactions and substrate effects for an adamantane monolayer on the Au(111) surface
Yuki Sakai, Giang D. Nguyen, Rodrigo B. Capaz +8
We study theoretically and experimentally the infrared (IR) spectrum of an adamantane monolayer on a Au(111) surface. Using a new STM-based IR spectroscopy technique (IRSTM) we are…
Imprint of transition metal d-orbitals on graphene Dirac cone
Qin Zhou, Sinisa Coh, Marvin L. Cohen +2
We investigate the influence of SiO2, Au, Ag, Cu, and Pt substrates on the Raman spectrum of graphene. Experiments reveal particularly strong modifications to the intensity, positi…