Fano-Rashba effect in thermoelectricity of a double quantum dot molecular junction

Liu, Y. S.; Hong, Xiaodong; Feng, Jian; Yang, Xifeng

doi:10.1186/1556-276x-6-618

Cited by 23 publications

(15 citation statements)

References 53 publications

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“…29,30 Theoretical studies of such structures indicate some enhancement of the thermoelectric figure of merit and possibility of pure spin current generation. 31,32 Although a lot of the above properties have been already studied, mostly in the linear response regime, there have been recently many proposals of quantum-dot-based heat engines, where one needs to go beyond the linear response limit. The heat engine based on a singlelevel quantum dot coupled to two metallic reservoirs has been theoretically predicted to reach either the Curzon-Ahlborn efficiency, i.e.…”

Section: Introductionmentioning

confidence: 99%

Thermoelectric properties of a quantum dot coupled to magnetic leads by Rashba spin-orbit interaction

Karwacki

Barnaś

2018

Phys. Rev. B

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We consider a single-level quantum dot coupled to two leads which are ferromagnetic in general. Apart from tunneling processes conserving electron spin, we also include processes associated with spin-flip of tunneling electrons, which appear due to Rashba spin-orbit coupling. Charge and heat currents are calculated within the non-equilibrium Green's function technique. When the electrodes are half-metallic (fully spin polarized), the Rashba spin-orbit coupling leads to Fano-like interference effects, which result in an enhanced thermoelectric response. It is also shown that such a system can operate as efficient heat engine. Furthermore, the interplay of Rashba spin-orbit coupling and Zeeman splitting due to an external magnetic field is shown to allow control over such parameters of the heat engine as the power and efficiency.

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Section: Introductionmentioning

confidence: 99%

Thermoelectric properties of a quantum dot coupled to magnetic leads by Rashba spin-orbit interaction

Karwacki

Barnaś

2018

Phys. Rev. B

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“…For a material to be a good thermoelectric cooler, it must have a high thermoelectric figure of merit ZT. Much of the recent work on thermoelectric materials has focused on the ability of heterostructures and quantum confinement to increase efficiency over bulk materials [5-7]. …”

Section: Introductionmentioning

confidence: 99%

Using anodic aluminum oxide templates and electrochemical method to deposit BiSbTe-based thermoelectric nanowires

Kuo

Yen

et al. 2014

Nanoscale Res Lett

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In this study, the cyclic voltammetry method was first used to find the reduced voltages and anodic peaks of Bi3+, Sb3+, and Te4+ ions as the judgments for the growth of the (Bi,Sb)2 - x Te3 + x-based materials. Ethylene glycol (C2H6O2) was used as a solvent, and 0.3 M potassium iodide (KI) was used to improve the conductivity of the solution. Two different electrolyte formulas were first used: (a) 0.01 M Bi(NO3)3-5H2O, 0.01 M SbCl3, and 0.01 M TeCl4 and (b) 0.015 M Bi(NO3)3-5H2O, 0.005 M SbCl3, and 0.0075 M TeCl4. The potentiostatic deposition process was first used to find the effect of reduced voltage on the variation of compositions of the (Bi,Sb)2 - xTe3 + x-based materials. After finding the better reduced voltage, 0.01 M Bi(NO3)3-5H2O, 0.01 M SbCl3, and 0.01 M TeCl4 were used as the electrolyte formula. The pulse deposition process was successfully used to control the composition of the (Bi,Sb)2 - xTe3 + x-based materials and grow the nanowires in anodic aluminum oxide (AAO) templates.

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“…12 These experimental works provide a powerful basis for designing and fabricating new-style spin-dependent thermoelectric devices. [13][14][15][16][17][18][19][20][21][22] This new subject is then called "thermo-spintronics." Due to the phase locking effect in the absence of magnetic field or magnetic materials, it is very difficult to generate spin-polarized currents in two-terminal devices.…”

Section: Introductionmentioning

confidence: 99%

A single-spin-current thermal generator

Liu

Yang

Hong

et al. 2012

Journal of Applied Physics

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We theoretically propose a single-spin-current thermal generator consisting of a Rashba quantum dot (QD), one hot electrode and two cold electrodes. The Rashba QD is directly coupled to the three electrodes, and there exists a bridge channel between the two cold electrodes. Our results show the QD device can be used to generate pure spin-up or spin-down currents in cold electrodes in the absence of bias voltages and magnetic materials. The underlying reason is a cooperative effect of the spin-dependent quantum interference effects originating from Rashba spin-orbit interaction in the QD and temperature gradients among the three electrodes. The working conditions for the single-spin-current thermal generator are also clearly presented. Moreover, we also find that the device can be converted from n-type to p-type or vice versa by a gate voltage. V C 2012 American Institute of Physics. [http://dx.

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Fano-Rashba effect in thermoelectricity of a double quantum dot molecular junction

Cited by 23 publications

References 53 publications

Thermoelectric properties of a quantum dot coupled to magnetic leads by Rashba spin-orbit interaction

Thermoelectric properties of a quantum dot coupled to magnetic leads by Rashba spin-orbit interaction

Using anodic aluminum oxide templates and electrochemical method to deposit BiSbTe-based thermoelectric nanowires

A single-spin-current thermal generator

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