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21 papers · 1 filter
In situ reduction of charge noise in GaAs/AlGaAs Schottky-gated devices
Christo Buizert, Frank H. L. Koppens, Michel Pioro-Ladriere +5
We show that an insulated electrostatic gate can be used to strongly suppress ubiquitous background charge noise in Schottky-gated GaAs/AlGaAs devices. Via a 2-D self-consistent si…
Spin-echo of a single electron spin in a quantum dot
F. H. L. Koppens, K. C. Nowack, L. M. K. Vandersypen
We report a measurement of the spin-echo decay of a single electron spin confined in a semiconductor quantum dot. When we tip the spin in the transverse plane via a magnetic field…
A cryogenic amplifier for fast real-time detection of single-electron tunneling
I. T. Vink, T. Nooitgedagt, R. N. Schouten +2
We employ a cryogenic High Electron Mobility Transistor (HEMT) amplifier to increase the bandwidth of a charge detection setup with a quantum point contact (QPC) charge sensor. The…
Coherent control of a single electron spin with electric fields
K. C. Nowack, F. H. L. Koppens, Yu. V. Nazarov +1
Manipulation of single spins is essential for spin-based quantum information processing. Electrical control instead of magnetic control is particularly appealing for this purpose,…
Gate-induced insulating state in bilayer graphene devices
Jeroen B. Oostinga, Hubert B. Heersche, Xinglan Liu +2
The potential of graphene-based materials consisting of one or a few layers of graphite for integrated electronics originates from the large room-temperature carrier mobility in th…
Detection of single electron spin resonance in a double quantum dot
F. H. L. Koppens, C. Buizert, I. T. Vink +4
Spin-dependent transport measurements through a double quantum dot are a valuable tool for detecting both the coherent evolution of the spin state of a single electron as well as t…