101. Thermopower of Multiorbital Kondo Effect via Single Quantum Dot System at Finite Temperatures
- Author
-
Rui Sakano, Tomoko Kita, and Norio Kawakami
- Subjects
Physics ,Condensed matter physics ,Kondo insulator ,General Physics and Astronomy ,Condensed Matter::Mesoscopic Systems and Quantum Hall Effect ,Resonance (particle physics) ,Tunnel effect ,Quantum dot ,Condensed Matter::Superconductivity ,Quantum mechanics ,Condensed Matter::Strongly Correlated Electrons ,Kondo effect ,Anderson impurity model ,Quantum tunnelling ,Spin-½ - Abstract
We study the thermopower and some related transport quantities due to the orbital Kondo effect in a single quantum dot system with a finite value of Coulomb repulsion by means of the noncrossing approximation applied to the multiorbital impurity Anderson model. It is elucidated how the asymmetry of the renormalized tunneling resonance due to the two-orbital Kondo effect causes characteristic behavior of the thermopower at finite temperatures under gate-voltage and magnetic-field control, which is compared with that of the ordinary spin Kondo effect.
- Published
- 2007
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