Non-Linear Thermal Current through Multilevel Quantum Dot Coupled to Ferromagnetic Electrodes

• Authors: M. Wierzbicki , R. Świrkowicz
• Languages of publication: EN

Abstracts

EN

We present studies of spin-dependent phenomena in the non-linear energy transport through a multilevel quantum dot/molecule in the Coulomb blockade regime. Calculations are performed within the framework of non-equilibrium Green function formalism based on the equation of motion. Thermal current flowing through the system due to temperature gradient significantly varies with gate voltage. It depends on relative orientation of magnetic moments in the electrodes, so in analogy to tunneling magnetoresistance the magnetothermal conductance is introduced, which describes the effect.

Keywords

EN

73.23.Hk; 73.50.Lw; 85.80.Fi

Discipline

• 73.50.Lw: Thermoelectric effects
• 73.23.Hk: Coulomb blockade; single-electron tunneling
• 85.80.Fi: Thermoelectric devices

• Journal: Acta Physica Polonica A
• Year: 2012
• Volume: 121
• Issue: 5-6
• Pages: 1204-1206

Dates

published

2012-05

Contributors

author

M. Wierzbicki

• Faculty of Physics, Warsaw University of Technology, Koszykowa 75, 00-662 Warsaw, Poland

author

R. Świrkowicz

• Faculty of Physics, Warsaw University of Technology, Koszykowa 75, 00-662 Warsaw, Poland

References

• 1. K. Uchida, S. Takahashi, K. Harii, J. Ieda, W. Koshibae, K. Ando, S. Maekawa, E. Saitoh, Nature 455, 778 (2008)
• 2. M. Hatami, G.E.W. Bauer, Q. Zhang, P.J. Kelly, Phys. Rev. B 79, 174426 (2009)
• 3. J. Koch, F. von Oppen, Y. Oreg, E. Sela, Phys. Rev. B 70, 195107 (2004)
• 4. M. Turek, K.A. Matveev, Phys. Rev. B 65, 115332 (2002)
• 5. Y. Dubi, M. Di Ventra, Phys. Rev. B 79, 081302 (2009)
• 6. R. Swirkowicz, M. Wierzbicki, J. Barnaś, Phys. Rev. B 80, 195409 (2009)
• 7. M. Wierzbicki, R. Swirkowicz, Phys. Rev. B 82, 165334 (2010)
• 8. Y.C. Chang, D.M.T. Kuo, Phys. Rev. B 77, 255412 (2008)
• 9. M. Wierzbicki, R. Swirkowicz, J. Phys. Condens. Matter 22, 185302 (2010)

Identifiers

DOI

10.12693/APhysPolA.121.1204