Thermoelectric Effect in the Normal Conductor-Superconductor Junction: A BTK Approach

Wysokiński, Marcin

doi:10.12693/aphyspola.122.758

Cited by 16 publications

(17 citation statements)

References 45 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This is due to the relativistic nature of charge carriers in graphene, where AR does not vanish even for the high effective barrier in our case effective barrier is only due to the Fermi level mismatch) for the subgap energies (for the normal incidence AR happens always with certainty 18 ). Furthermore, in the low doping regime (E F ∆ 0 ) the Seebeck coefficient for the GS junction is around one order of magnitude larger than even for high effective barrier value (which as a phenomenological parameter, can incorporate also the Fermi velocity mismatch 8 ) in the NS case 11 .…”

Section: A Linear Regimementioning

confidence: 98%

Seebeck effect in the graphene-superconductor junction

Wysokiński¹,

Spałek²

2013

Journal of Applied Physics

View full text Add to dashboard Cite

Thermopower of graphene-superconductor (GS) junction is analyzed within the extended Blonder- Tinkham-Klapwijk formalism. Within this approach we have also calculated the temperature de- pendence of the zero-bias conductance for GS junction. Both quantities reflect quasi-relativistic nature of massless Dirac fermions in graphene. Both, the linear and the non-linear regimes are considered.Comment: 5 pages, 4 figure

show abstract

Section: A Linear Regimementioning

confidence: 98%

Seebeck effect in the graphene-superconductor junction

Wysokiński¹,

Spałek²

2013

Journal of Applied Physics

View full text Add to dashboard Cite

show abstract

“…Such structures include inter alia planar systems [15][16][17][18][19][20] or systems containing single or double quantum dots. Theoretical studies of double quantum dots have been started very early with the main interests being focused on the Coulomb blockade effect [21][22][23][24][25][26], shot noise, tunnel magnetoresistance [27,28], etc.…”

Section: Introductionmentioning

confidence: 99%

Quantum dot as spin current generator and energy harvester

Szukiewicz

Wysokiński

2015

Eur. Phys. J. B

View full text Add to dashboard Cite

Abstract. The thermoelectric transport in the device composed of a central nanoscopic system in contact with two electrodes and subject to the external magnetic field of Zeeman type has been studied. The device can support pure spin current in the electrodes and may serve as a source of the temperature induced spin currents with possible applications in spintronics. The system may also be used as an energy harvester. We calculate its thermodynamic efficiency η and the power output P . The maximal efficiency of the device reaches the Carnot value when the device works reversibly but with the vanishing power. The interactions between carriers diminish the maximal efficiency of the device, which under the constant load drops well below the Carnot limit but may exceed the Curzon-Ahlborn limit. While the effect of intradot Coulomb repulsion on η depends on the parameters, the interdot/interlevel interaction strongly diminishes the device efficiency.

show abstract

“…Following BTK approach 38,46 , in presence of bias V and temperature gradient δT , we can express the net current flowing through the FS junction as,…”

Section: Discussionmentioning

confidence: 99%

“…Within the linear response regime, we obtain the expression for the thermopower or SkC in unit of k B /e as follows 46 ,…”

Section: S-wave Superconductormentioning

confidence: 99%

Thermoelectric properties of a ferromagnet-superconductor hybrid junction: Role of interfacial Rashba spin-orbit interaction

2017

View full text Add to dashboard Cite

We investigate thermoelectric properties of a ferromagnet-superconductor hybrid structure with Rashba spin-orbit interaction and delta function potential barrier at the interfacial layer. The exponential rise of thermal conductance with temperature manifests a cross-over temperature scale separating two opposite behaviors of it with the change of polarization in the ferromagnet whereas the inclusion of interfacial Rashba spin-orbit field results in a non-monotonic behavior of it with the strength of Rashba field. We employ scattering matrix approach to determine the amplitudes of all the scattering processes possible at the interface to explain the thermoelectric properties of the device. We examine Seebeck effect and show that higher thermopower can be achieved when the polarization of the ferromagnet tends towards the half-metallic limit. It can be enhanced even for lower polarization in presence of the finite potential barrier. In presence of interfacial Rashba spinorbit interaction, Seebeck coefficient rises with the increase of barrier strength and polarization at weak or moderate interfacial Rashba field. From the application perspective, we compute the figure of merit and show that zT ∼ 4 − 5 with higher polarization of the ferromagnet both in absence and presence of weak or moderate Rashba spin-orbit interaction along with the scalar potential barrier.

show abstract

Thermoelectric Effect in the Normal Conductor-Superconductor Junction: A BTK Approach

Cited by 16 publications

References 45 publications

Seebeck effect in the graphene-superconductor junction

Seebeck effect in the graphene-superconductor junction

Quantum dot as spin current generator and energy harvester

Thermoelectric properties of a ferromagnet-superconductor hybrid junction: Role of interfacial Rashba spin-orbit interaction

Contact Info

Product

Resources

About