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Article
Electron paramagnetic resonance study of the nuclear spin dynamics in an AlAs quantum well
The nuclear spin dynamics in an asymmetrically doped 16-nm AlAs quantum well grown along the [001] direction has been studied experimentally using the time decay of the Overhauser shift of paramagnetic resonan...
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Article
Single-spin CCD
The electron spins in a linear array of three quantum dots can be manipulated, shuttled and read out individually with high fidelity, resembling the functioning principle of a CCD (charge-coupled device).
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Article
Open AccessComparative study of microwave radiation-induced magnetoresistive oscillations induced by circularly- and linearly- polarized photo-excitation
A comparative study of the radiation-induced magnetoresistance oscillations in the high mobility GaAs/AlGaAs heterostructure two dimensional electron system (2DES) under linearly- and circularly- polarized mic...
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Article
Linear Polarization Rotation Study of the Microwave-Induced Magnetoresistance Oscillations in the GaAs/AlGaAs System
Microwave-induced zero-resistance states appear when the associated B-1-periodic magnetoresistance oscillations grow in amplitude and become comparable to the dark resistance of the two-dimensional electron syste...
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Article
Microwave Reflection From The Microwave Photo-Excited High Mobility GaAs/AlGaAs Two-Dimensional Electron System
We examine the microwave reflection from the high mobility GaAs/AlGaAs two-dimensional electron system (2DES). Strong correlations have been observed between the microwave induced magnetoresistance oscillation...
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Article
Open AccessAnomalous resistance overshoot in the integer quantum Hall effect
In this work we report on experiments performed on smooth edge-narrow Hall bars. The magneto-transport properties of intermediate mobility two-dimensional electron systems are investigated and analyzed within ...
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Article
Minimal-excitation states for electron quantum optics using levitons
Minimal-excitation fermionic quasiparticles are created by applying a potential with Lorentzian time dependence to the contact of a narrow constriction in a two-dimensional electron gas.
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Article
Open AccessSize-dependent giant-magnetoresistance in millimeter scale GaAs/AlGaAs 2D electron devices
Large changes in the electrical resistance induced by the application of a small magnetic field are potentially useful for device-applications. Such Giant Magneto-Resistance (GMR) effects also provide new insi...
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Article
Long-distance coherent coupling in a quantum dot array
Controlling long-distance quantum correlations is central to quantum computation and simulation. In quantum dot arrays, experiments so far rely on nearest-neighbour couplings only, and inducing long-distance c...
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Article
Direct map** of the formation of a persistent spin helix
The spin–orbit interaction (SOI) in zincblende semiconductor quantum wells can be set to a symmetry point, in which spin decay is strongly suppressed for a helical spin mode. Signatures of such a persistent sp...
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Article
Quantum interference and phonon-mediated back-action in lateral quantum-dot circuits
You influence a system by measuring it. This back-action is an important consideration when studying tiny structures in which quantum effects play a crucial role. Researchers now show that quantum interference...
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Article
Open AccessCoupling artificial molecular spin states by photon-assisted tunnelling
Artificial molecules containing just one or two electrons provide a powerful platform for studies of orbital and spin quantum dynamics in nanoscale devices. A well-known example of these dynamics is tunnelling...
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Article
Local investigation of the energy gap within the incompressible strip in the quantum Hall regime
We experimentally study the energy gap within the incompressible strip at local filling factor ν c = 1 at the quantum Hall edge for samples of very different mobilities. The obt...
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Article
Comparison of the marginal fit of different all-ceramic and metal-ceramic crown systems: an in vitro study
STATEMENT OF PROBLEM: High levels of fracture resistance offered by today's ceramic crown systems might eliminate the need for adhesive cementation. However, high accuracy of fit involving gap widths <75 µm is...
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Article
Confluence of resonant laser excitation and bidirectional quantum-dot nuclear-spin polarization
Resonant laser scattering along with photon correlation measurements established the atom-like character of quantum dots. Here, we show that for a wide range of experimental parameters it is impossible to isol...
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Article
Ballistic spin resonance
Electron spin resonance produced by high-frequency magnetic or electric fields has applications in fields as diverse as medicine and quantum information. A new variant of the phenomenon is reported in this iss...
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Article
Double-resonance Semiconductor Superlattice Parametric Oscillator for Generation of Subterahertz Radiation
We report on a subterahertz superlattice parametric oscillator that operated simultaneously at two different harmonic frequencies of a microwave pump field. A pump field (frequency near 100 GHz) was coupled to...
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Chapter and Conference Paper
Investigations on a dilute magnetic semicondutor (Ga1−xMnxAs) by conventional TEM and EELS
The Dilute Magnetic Semiconductor (DMS) Ga1−xMnxAs offers good prospects for the integration of ferromagnetic and semiconducting properties for use in future “spintronic” applications [1].
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Article
Cross-sectional imaging of spin injection into a semiconductor
Recent discoveries of phenomena that relate electronic transport in solids to the spin angular momentum of the electrons are the fundamentals of spin electronics (spintronics). The first proposed conceptual sp...
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Article
Hole-density dependence of the cyclotron mass of 2D holes in a GaAs(001) quantum well
The dependence of the heavy-hole cyclotron mass in GaAs(001) quantum wells on the 2D-hole density has been measured by the optical detection method for resonance microwave by-absorption. A significant increase...
