0000000000931363

AUTHOR

Young Hee Lee

showing 2 related works from this author

Transition from direct to Fowler-Nordheim tunneling in chemically reduced graphene oxide film.

2014

We investigate charge transport in a chemically reduced graphene oxide (RGO) film of sub-micron thickness. The I-V curve of RGO film shows current switching of the order of ∼10(5) above the threshold voltage. We found that the observed I-V curve is consistent with quantum tunnelling based charge transport. The quantum tunnelling based Simmons generalized theory was used to interpret the charge transport mechanism which shows that the current switching phenomenon is associated with transition from direct to Fowler-Nordheim (F-N) tunneling. The absence of current switching in the I-V curve after stripping away the oxygen functional groups from chemically RGO film confirms that the presence of…

Materials scienceCondensed matter physicsGrapheneOxideAnalytical chemistryHigh voltageCharge (physics)law.inventionThreshold voltageField electron emissionchemistry.chemical_compoundchemistrylawGeneral Materials ScienceCurrent (fluid)Quantum tunnellingNanoscale
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Spin-orbit, radial, and angular coupling effects in the NaRb excited states

2009

Spin-orbit, radial, and angular nonadiabatic matrix elements between the lowest excited states of NaRb are evaluated by quasi-relativistic ab initio methods, and the results accompanied by potential curves, permanent and transition moments are compared with experimental data and preceding calculations.

CouplingPhysicsAb initio quantum chemistry methodsElectric fieldExcited stateLaser coolingOrbit (dynamics)Ab initioPhysics::Atomic PhysicsPhysics::Chemical PhysicsAtomic physicsSpin (physics)
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