What lurks below the last plateau: experimental studies of the 0.7 × 2e(2)/h conductance anomaly in one-dimensional systems.
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In this article, a review report on experimental studies of fractionally quantized plateaus in semiconductor quantum point contacts and quantum wires, focusing on the 0.7 × 2e(2)/h conductance anomaly, its analogues at higher conductances and the zero-bias peak observed in the dc source-drain bias for conductances less than 2e (2) 2 /h.Abstract:
The integer quantised conductance of one-dimensional electron systems is a well-understood effect of quantum confinement. A number of fractionally quantised plateaus are also commonly observed. They are attributed to many-body effects, but their precise origin is still a matter of debate, having attracted considerable interest over the past 15 years. This review reports on experimental studies of fractionally quantised plateaus in semiconductor quantum point contacts and quantum wires, focusing on the 0.7 × 2e(2)/h conductance anomaly, its analogues at higher conductances and the zero-bias peak observed in the dc source-drain bias for conductances less than 2e(2)/h.read more
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Dissertation
Zigzag Phase Transition in Quantum Wires and Localization in the Inhomogeneous One-Dimensional Electron Gas
TL;DR: In this paper, the Zigzag Phase Transition in QuantumWires and Localization in the Inhomogeneous One-Dimensional Electron Gas are discussed. But the authors focus on the phase transition in quantum wires.
Dissertation
Integrated Readout at the Quantum-Classical Interface of Semiconductor Qubits
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Towards low-dimensional hole systems in Be-doped GaAs nanowires.
TL;DR: It is shown that contact annealing only brings small improvements for the moderately doped devices under conditions of lower anneal temperature and shortAnneal time, and a plateau in the sub-threshold region that is reproducible in separate cool-downs and indicative of possible conductance quantisation highlighting the potential for future quantum device studies in this material system.
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Spin current source based on a quantum point contact with local spin-orbit interaction
TL;DR: In this paper, a source of spin-polarized current based on quantum point contact with local spin-orbit interaction is proposed, which acts like a spin filter, and the spin polarization of the current is discussed as a function of the Fermi energy and the width of the point contact.
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Bound states, electron localization and spin correlations in low-dimensional GaAs/AlGaAs quantum constrictions.
TL;DR: The occurrence of local magnetization and the effects of electron localization in different models of quantum point contacts (QPCs) using spin-relaxed density functional theory (DFT/LSDA) by means of numerical simulations shows that strong confinement potential, low-electron density in the leads and top or implant gates favor electron localization.
References
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Significance of Electromagnetic Potentials in the Quantum Theory
Yakir Aharonov,D. Bohm +1 more
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