Programme

O.14 -- Oral, NCTP-39

Date: Wednesday, 30-07-2014

Time: 11h00 - 11h20

Magnetically controlled thermoelectric transport through Kondo quantum dot with spin-orbit interaction

Nguyen Thi Kim Thanh and Mikhail Kiselev

Institute of Physics, Vietnam Academy of Science and Technology, 10 Dao-Tan, Hanoi, Vietnam. The Abdus Salam international Centre for Theoretical Physics, Strada Costiera 11, I-34151, Trieste, Italy.

We consider effects of magnetic field on the thermopower of a single-electron transistor based on a quantum dot strongly coupled to one of the leads by a single-mode quantum point contact. We investigate the crossover from a two-channel Kondo effect to a single channel Kondo effect in Zeeman field for the case of strong spin-orbit (SO) interaction in the quantum point contact. It is shown that at the magnetic field smaller compared to effective field associated with the spin-orbit interaction, the thermo-electric transport depends on an angle between the Zeeman and SO fields allowing fine-tuning of Fermi-liquid to Non-Fermi-liquid crossover by the in-plane magnetic field.

Presenter: Nguyen Thi Kim Thanh