224 citations · 516 across the 7 of their papers we have counts for
7 papers
Realization of 5 h/e^2 with graphene quantum Hall resistance array
Jaesung Park, Wan-Seop Kim, Dong-Hun Chae
We report on realization of 10 quantum Hall devices in series fabricated using epitaxial graphene on silicon carbide. Precision measurements with a resistance bridge indicates that…
Quantum mechanical current-to-voltage conversion with quantum Hall resistance array
Dong-Hun Chae, Mun-Seog Kim, Wan-Seop Kim +2
Accurate measurement of the electric current requires a stable and calculable resistor for an ideal current to voltage conversion. However, the temporal resistance drift of a physi…
Asymmetric Electron-Hole Decoherence in Ion-Gated Epitaxial Graphene
Kil-Joon Min, Jaesung Park, Wan-Seop Kim +1
We report on asymmetric electron-hole decoherence in epitaxial graphene gated by an ionic liquid. The observed negative magnetoresistance near zero magnetic field for different gat…
Electrical Modulation of Superconducting Critical Temperature in Liquid-Gated Thin Niobium Films
Jiman Choi, Pradheesh R., Hyungsang Kim +3
We demonstrate that the superconducting critical temperature (Tc) of thin niobium films can be electrically modulated in a liquid-gated geometry device. Tc can be suppressed and en…
Excitonic Fano Resonance in Freestanding Graphene
Dong-Hun Chae, Tobias Utikal, Siegfried Weisenburger +4
We investigate the role of electron-hole correlations in the absorption of freestanding monolayer and bilayer graphene using optical transmission spectroscopy from 1.5 to 5.5 eV. L…
Hot Phonons in an Electrically Biased Graphene Constriction
Dong-Hun Chae, Benjamin Krauss, Klaus von Klitzing +1
Phonon carrier interactions can have significant impact on device performance. They can be probed by measuring the phonon lifetime, which reflects the interaction strength of a pho…
Laser-induced disassembly of a graphene single crystal into a nano-crystalline network
Benjamin Krauss, Timm Lohmann, Dong-Hun Chae +3
We report about investigations of time-dependent structural modifications in single crystal graphene due to laser irradiation even at moderate power levels of 1mW in a diffraction…