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Using the nonequilibrium Keldysh Green's function technique, the Fano effect of a parallel-coupled triple Rashba quantum dot system is investigated. The conductance as a function of electron energy is numerically calculated. Compared with the case of a parallel-coupled double quantum dot system, two additional Fano resonance peaks occur in the conductance spectrum. By adjusting the structural parameters, the two Fano resonance peaks may change into the resonance peaks. In addition, the influence of Rashba spin-orbit interaction on the conductance is studied. 相似文献
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Based on the Green’s function technique and the equation of motion approach,this paper theoretically studies the thermoelectric effect in parallel coupled double quantum dots (DQDs),in which Rashba spin-orbit interaction is taken into account.Rashba spin-orbit interaction contributions,even in a magnetic field,are exhibited obviously in the double quantum dots system for the thermoelectric effect.The periodic oscillation of thermopower can be controlled by tunning the Rashba spin-orbit interaction induced phase.The interesting spin-dependent thermoelectric effects will arise which has important influence on thermoelectric properties of the studied system. 相似文献
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Based on the transverse Ising model in the framework of the mean field approximation,this paper discusses a ferroelectric bilayer film with the surface transition layers within each constituent slab and an antiferroelectric interfacial coupling between two slabs.The hysteresis loop of a bilayer film is investigated.The results show that the surface transition layer in a ferroelectric bilayer film plays a significant role in realizing the multiple-state memory. 相似文献
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Combined effect of the transition layer and interfacial coupling on the properties of ferroelectric bilayer film 下载免费PDF全文
Within the framework of modified Ginzburg--Landau--Devonshire
phenomenological theory, a ferroelectric bilayer film with a
transition layer within each constituent film and an interfacial
coupling between two materials has been studied. Properties
including the Curie temperature and the spontaneous polarization of
a bilayer film composed of two equally thick ferroelectric
constituent films are discussed. The results show that the combined
effect of the transition layer and the interfacial coupling plays an
important role in explaining the interesting behaviour of
ferroelectric multilayer structures consisting of two ferroelectric
materials. 相似文献
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