464 citations · 1.6k across the 15 of their papers we have counts for
14 papers
Ytterbium-driven strong enhancement of electron-phonon coupling in graphene
Choongyu Hwang, Duck Young Kim, D. A. Siegel +7
We present high-resolution angle-resolved photoemission spectroscopy study in conjunction with first principles calculations to investigate how the interaction of electrons with ph…
Metal-insulator transition of the reduced surface of yttria-stabilized zirconia near Pt electrodes
D. A. Siegel, F. El Gabaly, K. F. McCarty +1
The electrochemical reactions of solid oxide fuel cells occur in the region where gas-phase species, electrode, and electrolyte coincide. When the electrode is an ionic insulator a…
Charge-Carrier Screening in Single-Layer Graphene
David A. Siegel, William Regan, Alexei V. Fedorov +2
The effect of charge-carrier screening on the transport properties of a neutral graphene sheet is studied by directly probing its electronic structure. We find that the Fermi veloc…
Fermi velocity engineering in graphene by substrate modification
Choongyu Hwang, David A. Siegel, Sung-Kwan Mo +5
The Fermi velocity is one of the key concepts in the study of a material, as it bears information on a variety of fundamental properties. Upon increasing demand on the device appli…
Direct measurement of quantum phases in graphene via photoemission spectroscopy
Choongyu Hwang, Cheol-Hwan Park, David A. Siegel +3
Quantum phases provide us with important information for understanding the fundamental properties of a system. However, the observation of quantum phases, such as Berry's phase and…
Electron-Phonon Coupling in Highly-Screened Graphene
David A. Siegel, Choongyu Hwang, Alexi V. Fedorov +1
Photoemission studies of graphene have resulted in a long-standing controversy concerning the strength of the experimental electron-phonon interaction in comparison with theoretica…