What lurks below the last plateau: experimental studies of the 0.7 × 2e(2)/h conductance anomaly in one-dimensional systems.
Reads0
Chats0
TLDR
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
More filters
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.
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: 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.
Journal Article
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
More filters
Journal ArticleDOI
Coupled quantum wires as a detector of many-body states below the last conductance plateau
A. Shailos,Yuichi Ochiai,Takahiro Morimoto,Y. Iwase,Nobuyuki Aoki,T. Sasaki,Jonathan P. Bird,Michael Lilly,John L. Reno,Jerry A. Simmons +9 more
TL;DR: In this paper, the authors demonstrate the presence of a resonant interaction between a pair of coupled quantum wires, which are realized in the ultra-high mobility two-dimensional electron gas of a GaAs/AlGaAs quantum well.
Journal ArticleDOI
Overcoming Contact Hurdles for Investigating Lower Dimensional Structures in Undoped Heterostructures
Stephen Sarkozy,Kantimay Das Gupta,Francois Sfigakis,Harvey E. Beere,Ian Farrer,Ruth Harrell,D. A. Ritchie,G. A. C. Jones +7 more
TL;DR: In this paper, Sarkozy et al. report a systematic study of the Au-Ge-Ni contact system, including a discussion of how a various diffusion barriers may prove beneficial, and how the etch depth of the recessed ohmic contact effects the window of success.
Journal ArticleDOI
Effect of temperature and magnetic field on the 0.7 structure in a ballistic one-dimensional wire
Kalarikad Thomas,J. T. Nicholls,Michael Pepper,Michelle Y. Simmons,D. R. Mace,David A. Ritchie +5 more
TL;DR: In this paper, the authors studied the effect of temperature on the evolution of the ballistic one-dimensional wires with increasing in-plane magnetic field and showed that the structure develops into a plateau at e(2/h) if either the inplane magnetic fields is increased or the carrier density is decreased.