Electron interaction with confined acoustic phonons in cylindrical quantum wires via deformation potential

1996 ◽  
Vol 80 (5) ◽  
pp. 2815-2822 ◽  
Author(s):  
SeGi Yu ◽  
K. W. Kim ◽  
Michael A. Stroscio ◽  
G. J. Iafrate ◽  
Arthur Ballato
Keyword(s):  
Quantum Wires ◽  
Electron Interaction ◽  
Deformation Potential ◽  
Acoustic Phonons

Erratum: Electron interaction with confined acoustic phonons in quantum wires subjected to a magnetic field [Phys. Rev. B57, 4687 (1998)]

1998 ◽  
Vol 58 (15) ◽  
pp. 10065-10065
Author(s):  
A. Svizhenko ◽  
A. Balandin ◽  
S. Bandyopadhyay ◽  
M. A. Stroscio
Keyword(s):  
Magnetic Field ◽  
Quantum Wires ◽  
Electron Interaction ◽  
Acoustic Phonons

Electron interaction with confined acoustic phonons in quantum wires subjected to a magnetic field

1998 ◽  
Vol 57 (8) ◽  
pp. 4687-4693 ◽  
Author(s):  
A. Svizhenko ◽  
A. Balandin ◽  
S. Bandyopadhyay ◽  
M. A. Stroscio
Keyword(s):  
Magnetic Field ◽  
Quantum Wires ◽  
Electron Interaction ◽  
Acoustic Phonons

Electronic properties of semiconductor quantum wires for shallow symmetric and asymmetric confinements

2021 ◽  
Author(s):  
Irina I. Yakimenko ◽  
Ivan P. Yakimenko
Keyword(s):  
Electron Transport ◽  
Density Functional ◽  
Quantum Wires ◽  
Zero Magnetic Field ◽  
Electron Interaction ◽  
Spin Polarized ◽  
Quantum Point ◽  
Dimensional Electron Gas ◽  
The One ◽  
Quantum Technology

Abstract Quantum wires (QWs) and quantum point contacts (QPCs) have been realized in GaAs/AlGaAs heterostructures in which a two-dimensional electron gas (2DEG) resides at the interface between GaAs and AlGaAs layered semiconductors. The electron transport in these structures has previously been studied experimentally and theoretically, and a 0.7 conductance anomaly has been discovered. The present paper is motivated by experiments with a QW in shallow symmetric and asymmetric confinements that have shown additional conductance anomalies at zero magnetic field. The proposed device consists of a QPC that is formed by split gates and a top gate between two large electron reservoirs. This paper is focused on the theoretical study of electron transport through a wide top-gated QPC in a low-density regime and is based on density functional theory. The electron-electron interaction and shallow confinement make the splitting of the conduction channel into two channels possible. Each of them becomes spin-polarized at certain split and top gates voltages and may contribute to conductance giving rise to additional conductance anomalies. For symmetrically loaded split gates two conduction channels contribute equally to conductance. For the case of asymmetrically applied voltage between split gates conductance anomalies may occur between values of 0.25(2e2/h) and 0.7(2e2/h) depending on the increased asymmetry in split gates voltages. This corresponds to different degrees of spin-polarization in the two conduction channels that contribute differently to conductance. In the case of a strong asymmetry in split gates voltages one channel of conduction is pinched off and just the one remaining channel contributes to conductance. We have found that on the perimeter of the anti-dot there are spin-polarized states. These states may also contribute to conductance if the radius of the anti-dot is small enough and tunnelling between these states may occur. The spin-polarized states in the QPC with shallow confinement tuned by electric means may be used for the purposes of quantum technology.

scholarly journals ELECTRON–ELECTRON INTERACTION EFFECTS ON TRANSPORT THROUGH MESOSCOPIC SUPERCONDUCTING HYBRID JUNCTIONS

2013 ◽  
Vol 27 (21) ◽  
pp. 1330015 ◽  
Author(s):  
ARIJIT SAHA
Keyword(s):  
Quantum Wires ◽  
Research Work ◽  
Spin Current ◽  
Point Of View ◽  
Electron Interaction ◽  
Experimental Point ◽  
Pure Spin ◽  
Liquid Theory ◽  
Superconducting Junction ◽  
The Stability

Effects due to the proximity of a superconductor has motivated a lot of research work in the last several decades both from theoretical and experimental point of view. In this review, we are going to describe the physics of systems containing normal metal-superconductor interface. Mainly we discuss transport properties through such hybrid structures. In particular, we describe the effects of electron–electron interaction on transport through such superconducting junction of multiple one-dimensional quantum wires. The latter can be described in terms of a non-Fermi liquid theory called Luttinger liquid. In this review, from the application point of view, we also demonstrate the possible scenarios for production of pure spin current and large tunneling magnetoresistance in such hybrid junctions and analyze the influence of electron–electron interaction on the stability of the production of pure spin current.

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