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
Citations
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Quantized Thermal Conductance of Dielectric Quantum Wires
Luis G. C. Rego,George Kirczenow +1 more
TL;DR: In this paper, the authors used the Landauer formulation of transport theory to predict that dielectric quantum wires should exhibit quantized thermal conductance at low temperatures in a ballistic phonon regime.
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A review of progress in the physics of open quantum systems: theory and experiment.
Ingrid Rotter,Jonathan P. Bird +1 more
TL;DR: A detailed discussion of the behavior of mesoscopic devices (and other OQSs) in terms of the projection-operator formalism, and discusses experiments on mesoscopic quantum point contacts that provide evidence of the environmentally-mediated coupling of quantum states.
Journal ArticleDOI
A review of progress in the physics of open quantum systems: theory and experiment
Ingrid Rotter,Jonathan P. Bird +1 more
TL;DR: In this paper, the authors provide a detailed discussion of the behavior of OQSs in terms of the projection operator formalism, according to which the system under study is considered to be comprised of a localized region, embedded into a well-defined environment of scattering wavefunctions (with $Q+P=1$).
Density dependent spin polarisation in ultra low-disorder quantum wires
David J. Reilly,T. M. Buehler,Jeremy L. O'Brien,Alex R. Hamilton,Andrew S. Dzurak,R. G. Clark,Bruce E. Kane,L. N. Pfeiffer,Ken W. West +8 more
TL;DR: In this paper, the authors present conductance measurements on ultra-low-disorder quantum wires supportive of a spin polarization at B = 0.5-0.7)x2e(2)/h in conductance data.
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All-Electric Quantum Point Contact Spin Polarizer
TL;DR: Experimental evidence is presented that a quantum point contact -- a short wire -- made from a semiconductor with high intrinsic spin-orbit coupling can generate a completely spin-polarized current when its lateral confinement is made highly asymmetric.
References
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Direction-resolved transport and possible many-body effects in one-dimensional thermopower
N. J. Appleyard,J. T. Nicholls,Michael Pepper,W. R. Tribe,Michelle Y. Simmons,David A. Ritchie +5 more
TL;DR: In this paper, a ballistic 1D wire was measured with a single-particle theory due to Mott predicts a proportionality between the diffusion thermopower and the energy derivative of the logarithm of the conductance.
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Ferromagnetic correlations in quasi-one-dimensional conducting channels
Boris Spivak,Fei Zhou +1 more
TL;DR: In this article, the authors proposed a model that explains the experimental observation of spontaneous spin polarization of conducting electrons in quasi-one-dimensional channels, and showed that a ferromagnetic order is a generic property of such channels.
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2D-1D coupling in cleaved edge overgrowth
TL;DR: In this paper, the scattering properties of an interface between a one-dimensional wire and a two-dimensional electron gas were studied in the highly controlled geometry provided by molecular bean epitaxy overgrowth onto the cleaved edge of a high quality GaAs/AlGaAs quantum well.
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Conductance anomalies in a one-dimensional quantum contact
TL;DR: In this article, the authors demonstrate that short length quantum wires exhibit a conductance structure at the value of conductance close to 0.7 \times 2e^2/h.
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Quantized conductance in a heterostructurally defined Ga0.25In0.75As/InP quantum wire
Peter Ramvall,Niclas Carlsson,Ivan Maximov,Pär Omling,Lars Samuelson,W. Seifert,Qin Wang,Sebastian Lourdudoss +7 more
TL;DR: In this paper, the authors observed quantized conductance up to 10 K in epitaxially regrown, heterostructurally defined, 100nm-wide Ga0.25In0.75As/InP quantum wires.