Tunable spin-polarized transport through a side-gated double quantum dot molecular junction in the Coulomb blockade regime

Dai, Ye-Bin; Wang, Xuefeng; Vasilopoulos, P.; Liu, Yu‐Shen

doi:10.1007/s13204-019-00981-y

Cited by 5 publications

(3 citation statements)

References 29 publications

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“…For the purpose of access to charge and spin thermoelectric coefficients we need to find all the relevant transport integrals related to these coefficients, i.e. , and , these integrals have general definitions that are given by [31,32]:…”

Section: Model and Formalismmentioning

confidence: 99%

The Charge and Spin Thermoelectric Properties across Double Quantum Dots Serially Coupled to Ferromagnetic Leads: The Case of Parallel Magnetic Configuration

Najdi

2022

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In this article, the charge and spin thermoelectric properties of double quantum dots system connected to ferromagnetic leads with collinear magnetic configurations will be studied in the linear response regime. Our results are calculated in a strong interdot coupling regime by taking into consideration all parameters affecting the system such as interaction between dots and their coupling to the leads, intradot Coulomb correlation energy and spin-polarization on the leads. It is found that in the parallel magnetic configuration, the thermoelectric efficiency can reach a large value around the spin-down resonance levels when the tunneling coupling between the quantum dots and the leads for the spin-down electrons are small, which leads to the pure spin Seebeck contribution. As a result, this system can generate a spin-polarized current. The value of the spin figure of merit is enhanced by increasing the spin-polarization and decreasing the correlation energy.

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Section: Model and Formalismmentioning

confidence: 99%

The Charge and Spin Thermoelectric Properties across Double Quantum Dots Serially Coupled to Ferromagnetic Leads: The Case of Parallel Magnetic Configuration

Najdi

2022

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“…Specifically, in addition to the traditional charge thermoelectric properties, producing spin current from temperature gradient becomes one of the focuses due to the recent advances in spintronics 12 . Pure thermal spin current with large Seebeck coefficients and figure of merit (ZT) is highly pursued 4,6,[11][12][13][14] .…”

Section: Thermoelectric Properties Of Graphene-like Nanoribbon Studiementioning

confidence: 99%

Thermoelectric properties of graphene-like nanoribbon studied from the perspective of symmetry

Dai

Luo

Wang

2020

Sci Rep

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We have studied the charge and spin thermopower systematically in a ferromagnetic junction of graphene-like zigzag nanoribbon modified by two on-site disorders in the tight-binding model. Symmetries of the transmission spectra and geometry configuration of the two disorders are important factors in determining the thermoelectric properties of the system. Conditions to achieve pure charge and pure spin thermopower are discussed from the perspective of symmetry. Symmetry breaking is required sometimes to obtain large figure of merit. The type and strength of the disorders can be used to further manipulate the spin polarization of thermal current. Disorders inside nanoribbon instead of on edge can then be used to finely tune the performance of the junction. The results may have great application value in designing thermoelectric devices.

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“…In the systems, which consider double QD, the features of behaviour of thermopower and ZT depending on detuning energy in presence of several tunneling channels were found in, e.g., [37], [38], [39], [40].…”

Section: Introductionmentioning

confidence: 99%

Thermoelectric Effects in Tunneling of Spin-Polarized Electrons in a Molecular Transistor

Shkop

2022

J Low Temp Phys

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Tunable spin-polarized transport through a side-gated double quantum dot molecular junction in the Coulomb blockade regime

Cited by 5 publications

References 29 publications

The Charge and Spin Thermoelectric Properties across Double Quantum Dots Serially Coupled to Ferromagnetic Leads: The Case of Parallel Magnetic Configuration

The Charge and Spin Thermoelectric Properties across Double Quantum Dots Serially Coupled to Ferromagnetic Leads: The Case of Parallel Magnetic Configuration

Thermoelectric properties of graphene-like nanoribbon studied from the perspective of symmetry

Thermoelectric Effects in Tunneling of Spin-Polarized Electrons in a Molecular Transistor

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