Thermoelectric Effects in Carbon Nanotube Quantum Dot in the Kondo Regime

• Authors: D. Krychowski , S. Lipiński
• Languages of publication: EN

Abstracts

EN

Thermoelectric effects in a carbon nanotube quantum dot in the Kondo regime are studied by the equation of motion method. The thermopower is highly sensitive to the structure of the spectral density near the Fermi edge. For temperatures close to the Kondo temperature the thermopower approaches a local minimum, which becomes sharper for orbital energies closer to the Fermi level. For higher temperatures the tjermopower increases, but in the temperature range corresponding to charging energy it again drops and achieves significant negative values. We examine the consequences of symmetry breaking of spin-orbital SU(4) system on thermopower.

Keywords

EN

73.63.KV; 72.10.Fk; 73.63.-b; 65.80.+n

Discipline

• 73.63.-b: Electronic transport in nanoscale materials and structures(see also 73.23.-b Electronic transport in mesoscopic systems)
• 72.10.Fk: Scattering by point defects, dislocations, surfaces, and other imperfections (including Kondo effect)

• Journal: Acta Physica Polonica A
• Year: 2008
• Volume: 113
• Issue: 2
• Pages: 645-649

Dates

published

2008-02

received

2007-05-07

Contributors

author

D. Krychowski

• Institute of Molecular Physics, Polish Academy of Sciences, Smoluchowskiego 17, 60-178 Poznań, Poland

author

S. Lipiński

• Institute of Molecular Physics, Polish Academy of Sciences, Smoluchowskiego 17, 60-178 Poznań, Poland

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Identifiers

DOI

10.12693/APhysPolA.113.645