Programme

I.4 -- Invited, VCTP-45

Date: Tuesday, 13 October 2020

Time: 10:30 - 11:00

Thermoelectric transport in a three channel charge Kondo circuit

T. K. T. Nguyen (1) and M. N. Kiselev (2)

(1) Institute of Physics, Vietnam Academy of Science and Technology, 10 Dao Tan, Hanoi, Vietnam (2) The Abdus Salam International Centre for Theoretical Physics, Strada Costiera 11, I-34151, Trieste, Italy

Abstract: In this talk I will present our theoretical work about the thermoelectric transport through a circuit implementation of the three-channel charge Kondo model quantum simulator [Z. Iftikhar et al., Science 360, 1315 (2018)]. The universal temperature scaling law of the Seebeck coefficient is computed perturbatively approaching the non-Fermi liquid strong coupling fixed point using abelian bosonization technique. The predicted $T^{1/3} log T$ scaling behaviour of the thermoelectric power sheds a light on the properties of $Z_{3}$ emerging parafermions and gives an access to exploring pre-fractionalized zero modes in the quantum transport experiments. We discuss a generalization of approach for investigating a multi-channel Kondo problem with emergent $Z_{N}$ to $Z_{M}$ crossovers between “weak" non-Fermi liquid regimes corresponding to different low-temperature fixed points. Ref: T. K. T. Nguyen and M. N. Kiselev, Phys. Rev. Lett. 125, 026801 (2020)

Presenter: Nguyen Thi Kim Thanh