Electron-electron interaction and the persistent current in a quantum ring

1994 ◽  
Vol 50 (12) ◽  
pp. 8460-8468 ◽  
Author(s):  
Tapash Chakraborty ◽  
Pekka Pietiläinen
Keyword(s):  
Persistent Current ◽  
Electron Interaction ◽  
Quantum Ring

scholarly journals Persistent current induced by vacuum fluctuations in a quantum ring

2013 ◽  
Vol 87 (24) ◽  
Author(s):  
O. V. Kibis ◽  
O. Kyriienko ◽  
I. A. Shelykh
Keyword(s):  
Persistent Current ◽  
Quantum Ring ◽  
Vacuum Fluctuations

scholarly journals Tunneling coefficient and persistent current in triple-arm quantum ring with double δ　barrier

2009 ◽  
Vol 58 (11) ◽  
pp. 7926
Author(s):  
Du Jian ◽  
Wang Su-Xin ◽  
Yang Shu-Min
Keyword(s):  
Persistent Current ◽  
Quantum Ring

scholarly journals Electronic states and persistent currents in nanowire quantum ring

2018 ◽  
Vol 52 (4) ◽  
pp. 486
Author(s):  
I.A. Kokurin
Keyword(s):  
Magnetic Field ◽  
Energy Levels ◽  
Persistent Current ◽  
Orbit Coupling ◽  
Quantum Ring ◽  
Pure Spin ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Persistent Currents ◽  
The One

AbstractA new model of a quantum ring defined inside a nanowire is proposed. The one-particle Hamiltonian for electron in [111]-oriented nanowire quantum ring is constructed taking into account both Rashba and Dresselhaus spin-orbit coupling. The energy levels as a function of magnetic field are found using the exact numerical diagonalization. The persistent currents (both charge and spin) are calculated. The specificity of spin-orbit coupling and arising anticrossings in energy spectrum lead to unusual features in persistent current behavior. The variation of magnetic field or carrier concentration by means of gates can lead to pure spin persistent current with the charge current being zero.

DRIVEN MESOSCOPIC ELECTRIC CIRCUITS

2008 ◽  
Vol 22 (01) ◽  
pp. 51-60 ◽  
Author(s):  
F. KHEIRANDISH ◽  
H. PAHLAVANI
Keyword(s):  
Quantum Theory ◽  
Energy Spectrum ◽  
Algebraic Approach ◽  
Electric Circuit ◽  
External Source ◽  
Persistent Current ◽  
Time Dependent ◽  
Quantum Ring ◽  
Electric Circuits

The quantum theory for a mesoscopic electric circuit with charge discreteness is investigated. The persistent current on a quantum ring using an algebraic approach have been obtained. The energy spectrum and the persistent current of a quantum LC-design mesoscopic circuit, with a time-dependent external source, have been found.

scholarly journals Conductance and persistent current of a quantum ring coupled to a quantum wire under external fields

2003 ◽  
Vol 68 (19) ◽  
Author(s):  
P. A. Orellana ◽  
M. L. Ladrón de Guevara ◽  
M. Pacheco ◽  
A. Latgé
Keyword(s):  
Quantum Wire ◽  
Persistent Current ◽  
Quantum Ring ◽  
External Fields

scholarly journals Magnetotransport in mesoscopic rings and cylinders: effects of electron-electron interaction and spin-orbit coupling

2012 ◽  
Vol 1 (3) ◽  
pp. 255-271
Author(s):  
Santanu K. Maiti
Keyword(s):  
Nearest Neighbor ◽  
Single Channel ◽  
Tight Binding ◽  
Persistent Current ◽  
Current Amplitude ◽  
Electron Interaction ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Depth Analysis ◽  
Hopping Model

AbstractWe undertake an in-depth analysis of the magnetotransport properties in mesoscopic single-channel rings and multichannel cylinders within a tight-binding (TB) formalism. The main focus of this review is to illustrate how the long-standing anomalies between the calculated and measured current amplitudes carried by a small conducting ring upon the application of a magnetic flux ϕcan be removed. We discuss two different cases. First, we examine the combined effect of second-neighbor hopping integral and Hubbard correlation on the enhancement of persistent current in the presence of disorder. A significant change in current amplitude is observed compared to the traditional nearest-neighbor hopping model, and the current amplitude becomes quite comparable to experimental realizations. In the other case, we verify that in the presence of spin-orbit interaction, a considerable enhancement of persistent current amplitude takes place, and the current amplitude in a disordered ring becomes almost comparable to that of an ordered one. In addition to these, we also present the detailed band structures and some other related issues to get a complete picture of the phenomena at the microscopic level.

scholarly journals Effect of δ barrier on persistent current in a quantum ring with multiple arms

2010 ◽  
Vol 59 (4) ◽  
pp. 2767
Author(s):  
Du Jian ◽  
Wang Su-Xin ◽  
Yuan Ai-Guo
Keyword(s):  
Persistent Current ◽  
Quantum Ring
Sign in / Sign up

Export Citation Format

Share Document