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Controlled Electrochemical Intercalation of Graphene/h-BN van der Waals Heterostructures
S. Y. Frank Zhao, Giselle A. Elbaz, D. Kwabena Bediako +11
Electrochemical intercalation is a powerful method for tuning the electronic properties of layered solids. In this work, we report an electro-chemical strategy to controllably inte…
Coulomb engineering of the bandgap in 2D semiconductors
Archana Raja, Andrey Chaves, Jaeeun Yu +13
The ability to control the size of the electronic bandgap is an integral part of solid-state technology. Atomically-thin two-dimensional crystals offer a new approach for tuning th…
Intrinsic lineshape of the Raman 2D-mode in freestanding graphene monolayers
Stéphane Berciaud, Xianglong Li, Han Htoon +3
We report a comprehensive study of the two-phonon inter-valley (2D) Raman mode in graphene monolayers, motivated by recent reports of asymmetric 2D-mode lineshapes in freestanding…
High-resolution spatial mapping of the temperature distribution of a Joule self-heated graphene nanoribbon
Young-Jun Yu, Melinda Y. Han, Stephane Berciaud +5
We investigate the temperature distributions of Joule self-heated graphene nanoribbons (GNRs) with a spatial resolution finer than 100 nm by scanning thermal microscopy (SThM). The…
Electron and optical phonon temperatures in electrically biased graphene
Stéphane Berciaud, Melinda Y. Han, Louis E. Brus +2
We examine the intrinsic energy dissipation steps in electrically biased graphene channels. By combining in-situ measurements of the spontaneous optical emission with a Raman spect…
Excitons and high-order optical transitions in individual carbon nanotubes
Stephane Berciaud, Christophe Voisin, Hugen Yan +6
We examine the excitonic nature of high-lying optical transitions in single-walled carbon nanotubes by means of Rayleigh scattering spectroscopy. A careful analysis of the principa…