35 citations · 164 across the 11 of their papers we have counts for
9 papers · 1 filter
Measuring the arrival time of an electron wave packet using a dynamical potential barrier
Wanki Park, H. -S. Sim, Sungguen Ryu
A time-dependent potential barrier has been used to probe the arrival-time distribution of the wave packet of a hot electron by raising the barrier to block the packet upon arrival…
Time-resolved Coulomb collision of single electrons
J. D. Fletcher, W. Park, S. Ryu +7
Precise control over interactions between ballistic electrons will enable us to exploit Coulomb interactions in novel ways, to develop high-speed sensing, to reach a non-linear reg…
Conductance of electrostatic wire junctions in bilayer graphene
Sungguen Ryu, Rosa López, Llorenç Serra
The conductance of electrostatic wire junctions in bilayer graphene, classified as trivial-trivial or trivial-topological regarding the confinement character on each junction side,…
Partition of Two Interacting Electrons by a Potential Barrier
Sungguen Ryu, H. -S. Sim
Scattering or tunneling of an electron at a potential barrier is a fundamental quantum effect. Electron-electron interactions often affect the scattering, and understanding of the…
Beating Carnot efficiency with periodically driven chiral conductors
Sungguen Ryu, Rosa López, Llorenç Serra +1
Classically, the power generated by an ideal thermal machine cannot be larger than the Carnot limit. This profound result is rooted in the second law of thermodynamics. A hot quest…
Asymmetric arms maximise visibility in hot-electron interferometers
Clarissa J. Barratt, Sungguen Ryu, Lewis A. Clark +3
We consider theoretically an electronic Mach-Zehnder interferometer constructed from quantum Hall edge channels and quantum point contacts, fed with single electrons from a dynamic…
Picosecond coherent electron motion in a silicon single-electron source
Gento Yamahata, Sungguen Ryu, Nathan Johnson +3
Understanding ultrafast coherent electron dynamics is necessary for application of a single-electron source to metrological standards, quantum information processing, including ele…
LO-phonon emission rate of hot electrons from an on-demand single-electron source in a GaAs/AlGaAs heterostructure
N. Johnson, C. Emary, S. Ryu +10
Using a recently-developed time-of-flight measurement technique with 1 ps time resolution and electron-energy spectroscopy, we developed a method to measure the longitudinal-optica…
Phonon emission and arrival times of electrons from a single-electron source
C. Emary, A. Dyson, Sungguen Ryu +2
In recent charge-pump experiments, single electrons are injected into quantum Hall edge channels at energies significantly above the Fermi level. We consider here the relaxation of…