Thermoelectric and Interference Effects in a Kondo-Correlated Quantum Dot with Rashba Spin-Orbit Coupling

• Authors: Ł. Karwacki , P. Trocha , J. Barnaś
• Languages of publication: EN

Abstracts

EN

Thermoelectric effects in spin-polarized transport through a strongly correlated quantum dot coupled to two ferromagnetic leads is investigated theoretically by means of the finite-U slave boson technique. The dot is coupled to the leads both symmetrically via the spin-conserving tunneling processes and asymmetrically via spin-nonconserving Rashba-induced tunneling terms. The asymmetric coupling leads to various interference effects which modify transport properties. We have analyzed such thermoelectric coefficients like the electronic contribution to heat conductance κ, thermopower S, and thermoelectric efficiency ZT.

Keywords

EN

73.23.-b; 73.63.Kv; 72.15.Qm; 85.35.Ds

Discipline

• 72.15.Qm: Scattering mechanisms and Kondo effect(see also 75.20.Hr Local moments in compounds and alloys; Kondo effect, valence fluctuations, heavy fermions in magnetic properties and materials)
• 85.35.Ds: Quantum interference devices
• 73.23.-b: Electronic transport in mesoscopic systems
• 73.63.Kv: Quantum dots

• Journal: Acta Physica Polonica A
• Year: 2013
• Volume: 124
• Issue: 5
• Pages: 901-904

Dates

published

2013-11

Contributors

author

Ł. Karwacki

• Faculty of Physics, Adam Mickiewicz University, Umultowska 85, 61-614 Poznań, Poland

author

P. Trocha

• Faculty of Physics, Adam Mickiewicz University, Umultowska 85, 61-614 Poznań, Poland

author

J. Barnaś

• Faculty of Physics, Adam Mickiewicz University, Umultowska 85, 61-614 Poznań, Poland
• Institute of Molecular Physics, Polish Academy of Sciences, M. Smoluchowskiego 17, 60-179 Poznań, Poland

References

• [1] Y.A. Bychkov, E.I. Rashba, J. Phys. C 17, 6039 (1984)
• [2] S. Datta, B. Das, Appl. Phys. Lett. 56, 665 (1990)
• [3] Q.-F. Sun, J. Wang, H. Guo, Phys. Rev. B 71, 165310 (2005)
• [4] P. Stefański, J. Phys., Condens. Matter 22, 505303 (2010)
• [5] P.A. Orellana, M. Amado, F. Domínguez-Adame, Nanotechnology 19, 195401 (2008)
• [6] F. Mireles, G. Kirczenow, Phys. Rev. B 64, 024426 (2001)
• [7] Ł. Karwacki, P. Trocha, J. Barnaś, to be published
• [8] T.A. Costi, V. Zlatić, Phys. Rev. B 81, 235127 (2010)
• [9] D. Boese, R. Fazio, Europhys. Lett. 56, 576 (2001)
• [10] M. Krawiec, K.I. Wysokinski, Phys. Rev. B 73, 075307 (2006)
• [11] G. Kotliar, A.E. Rückenstein, Phys. Rev. Lett. 57, 1362 (1986)
• [12] B. Dong, X.L. Lei, J. Phys., Condens. Matter 14, 11747 (2002)

Identifiers

DOI

10.12693/APhysPolA.124.901