Spin-polarization-dependent quantum transport through a quantum-dot array

Wang, Rui; Wang, Jianming; Liang, J.-Q.

doi:10.1016/j.physb.2006.04.001

Cited by 4 publications

(2 citation statements)

References 20 publications

(19 reference statements)

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“…There is substantial experimental evidence that exciton energy is coherently propagated in the light-harvesting complex of photosynthetic organisms [33][34][35], and transmission lines that propagate exciton energy coherently along an array of chromophores have been devised [36]. Coherent electron transport can also occur between strongly coupled nanoparticles, such as quantum dots [37,38], or between atoms in conjugated hydrocarbon molecules.…”

Section: Introductionmentioning

confidence: 99%

Passive linear nanoscale optical and molecular electronics device synthesis from nanoparticles

Yurke

Kuang

2010

Phys. Rev. A

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Arrays of nanoparticles whose interactions can be characterized by hopping Hamiltonians can serve as excitation transmission lines. Here we show, that in addition suitable arrangements of nanoparticles can form beam splitters, phase shifters, and crossover splitters. With these elements, any discrete unitary transformation can be implemented on input modes via a network of nanoparticles in which all the components lie in the same plane. These nanoparticle networks can produce optical functionalities at a length scale much smaller than 1 µm.

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Section: Introductionmentioning

confidence: 99%

Passive linear nanoscale optical and molecular electronics device synthesis from nanoparticles

Yurke

Kuang

2010

Phys. Rev. A

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“…The Dresselhaus spin-orbit interaction couples spin states and space motion of conduction electrons that leads to spin splitting of the resonant level depending on the in-plane electron wave vector. Recently, Rui Wang, et al [3], studied quantum transport through a quantum dot array coupled with two semiinfinite leads using the tight-binding Hamiltonian which is spin-dependent due to external magnetic field. They have calculated both reflection and transmission probabilities using the transfer matrix method which depends on the spin-polarization.…”

Section: Introductionmentioning

confidence: 99%

Spin effect on the resonant tunneling characteristics of a double-barrier heterostructures under longitudinal stresses

Gutiérrez

Pérez-Merchancano

Marques

2008

Microelectronics Journal

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Exciton transfer in quantum dot arrays: Comparison of eigenbasis and site basis representations

Kubota

Nobusada

2008

The Journal of Chemical Physics

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We discuss differences between eigenbasis and site basis representations for models of exciton transfers in an array of quantum dots. The exciton relaxation processes are well described by the master equation in the eigenbasis representation. The site basis evolution equation up to the second order of the interdot interaction is straightforwardly derived from the eigenbasis equation by using perturbation theory when the interaction is sufficiently small compared to the energy difference between the exciton states in each quantum dot. Although the higher order site basis equations can be derived similarly, the resultant equations are too complicated to use in the actual calculations. The master equation in the eigenbasis representation has several advantages over the site basis one: (i) the system described in terms of the eigenbasis representation can evolve into thermal equilibrium because the equation satisfies the detailed balance, (ii) the site basis equation does not reasonably describe the exciton state trapped in a local energy minimum at very low temperature, and (iii) it is computationally less demanding to carry out the eigenbasis evolution equation.

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Spin-polarization-dependent quantum transport through a quantum-dot array

Cited by 4 publications

References 20 publications

Passive linear nanoscale optical and molecular electronics device synthesis from nanoparticles

Passive linear nanoscale optical and molecular electronics device synthesis from nanoparticles

Spin effect on the resonant tunneling characteristics of a double-barrier heterostructures under longitudinal stresses

Exciton transfer in quantum dot arrays: Comparison of eigenbasis and site basis representations

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