Publications (18)
Non-adiabatic single-electron pump in a dopant-free GaAs/AlGaAs 2DEG
B. Buonacorsi, F. Sfigakis, A. Shetty +7
We have realized quantized charge pumping using non-adiabatic single-electron pumps in dopant-free GaAs two-dimensional electron gases (2DEGs). The dopant-free III-V platform allow…
Magnetotransport Spectroscopy of Strongly Rashba-Split Hole Subbands Reveals Many-Body Interactions
F. Sfigakis, N. A. Cockton, M. Korkusinski +13
We report the results of magnetotransport experiments carried out on low-disorder 2D hole gases (2DHG) in the strongly correlated liquid regime, hosted in dopant-free (100) GaAs/Al…
Electroluminescence in dopant-free GaAs/AlGaAs single heterojunctions: 2D free excitons, H-band, and the tidal effect
N. Sherlekar, S. R. Harrigan, L. Tian +9
Bright electroluminescence (EL) from dopant-free ambipolar lateral p-n junctions in GaAs/AlGaAs single heterointerface (SH) heterostructures is used to probe neutral free excitons…
Structural Investigation of InAs-AlInAs and InAs-AlInP Core-Shell Nanowires
C. M. Haapamaki, J. Baugh, R. R. LaPierre
InAs nanowires were grown on GaAs substrates by the Au-assisted vapour-liquid-solid (VLS) method in a gas source molecular beam epitaxy (GS-MBE) system. Passivation of the InAs nan…
Effects of biased and unbiased illuminations on dopant-free GaAs/AlGaAs 2DEGs
A. Shetty, F. Sfigakis, W. Y. Mak +16
Illumination is performed at low temperature on dopant-free two-dimensional electron gases (2DEGs) of varying depths, under unbiased (gates grounded) and biased (gates at a positiv…
Quantum information processing using nuclear and electron magnetic resonance: review and prospects
J. Baugh, J. Chamilliard, C. M. Chandrashekar +13
This paper describes recent progress using nuclear magnetic resonance (NMR) as a platform for implementing quantum information processing (QIP) tasks. The basic ideas of NMR QIP ar…
Large nuclear Overhauser fields detected in vertically-coupled double quantum dots
J. Baugh, Y. Kitamura, K. Ono +1
We report the electrical induction and detection of dynamic nuclear polarization in the spin-blockade regime of double GaAs vertical quantum dots. The largest Overhauser field obse…
Enhanced effective masses, spin-orbit polarization, and dispersion relations in 2D hole gases under strongly asymmetric confinement
N. A. Cockton, F. Sfigakis, M. Korkusinski +13
The dispersion of Rashba-split heavy-hole subbands in GaAs two-dimensional hole gases (2DHGs) is difficult to access experimentally because strong heavy-hole-light-hole mixing prod…
Hybrid Epitaxial Al/InGaAs system: Solid-state dewetting and Al facet formation
A. Elbaroudy, N. Shaw, Sandra J. Gibson +4
Hybrid superconductor--semiconductor platforms can host subgap electronic excitations such as Andreev bound states (ABSs); in topological regimes, a special zero-energy class, Majo…
High transparency induced superconductivity in field effect two-dimensional electron gases in undoped InAs/AlGaSb surface quantum wells
E. Annelise Bergeron, F. Sfigakis, A. Elbaroudy +7
We report on transport characteristics of field effect two-dimensional electron gases (2DEG) in 24 nm wide indium arsenide surface quantum wells. High quality single-subband magnet…
Field effect two-dimensional electron gases in modulation-doped InSb surface quantum wells
E. Annelise Bergeron, F. Sfigakis, Y. Shi +6
We report on transport characteristics of field effect two-dimensional electron gases (2DEG) in surface indium antimonide quantum wells. The topmost 5 nm of the 30 nm wide quantum…
Using error correction to determine the noise model
M. Laforest, D. Simon, J. -C. Boileau +3
Quantum error correcting codes have been shown to have the ability of making quantum information resilient against noise. Here we show that we can use quantum error correcting code…
Critical shell thickness for InAs-AlInAs(P) core-shell nanowires
C. M. Haapamaki, J. Baugh, R. R. LaPierre
InAs nanowires with AlInP or AlInAs shells were grown on GaAs substrates by the Au-assisted vapour-liquid-solid (VLS) method in a gas source molecular beam e…
Nuclear Spins in Nanostructures
W. A. Coish, J. Baugh
We review recent theoretical and experimental advances toward understanding the effects of nuclear spins in confined nanostructures. These systems, which include quantum dots, defe…
Pulsed Electroluminescence in a Dopant-free Gateable Semiconductor
S. R. Harrigan, F. Sfigakis, L. Tian +7
We report on a stable form of pulsed electroluminescence in a dopant-free direct bandgap semiconductor heterostructure which we coin the tidal effect. Swapping an inducing gate vol…
Observation of an Abrupt 3D-2D Morphological Transition in Thin Al Layers Grown by MBE on InGaAs surface
A. Elbaroudy, B. Khromets, F. Sfigakis +7
Among superconductor/semiconductor hybrid structures, in-situ aluminum (Al) grown on InGaAs/InAs is widely pursued for the experimental realization of Majorana Zero Mode quasiparti…
A spin based heat engine: demonstration of multiple rounds of algorithmic cooling
C. A. Ryan, O. Moussa, J. Baugh +1
We show experimental results demonstrating multiple rounds of heat-bath algorithmic cooling in a 3 qubit solid-state nuclear magnetic resonance quantum information processor. By dy…
Time-reversal formalism applied to maximal bipartite entanglement: Theoretical and experimental exploration
M. Laforest, J. Baugh, R. Laflamme
Within the context of quantum teleportation, a proposed intuitive model to explain bipartite entanglement describes the scheme as being the same qubit of information evolving along…