Programme

P.57 -- Posters, VCTP-51

Date: Thursday, 6 August 2026

Time: 09:30 - 10:30

TWO-DIMENSIONAL GRAPHENE: PELTIER COEFFICIENT WITH ELECTRON-OPTICAL PHONON SCATTERING UNDER THE INFLUENCE OF INTENSE ELECTROMAGNETIC WAVE

Nguyen Quang Son (1,2), Nguyen Thu Huong (1,*), Nguyen Dinh Nam (2), Nguyen Thi Thanh Nhan (2), Do Xuan Bach (2), Nguyen Quang Bau (2)

(1) Faculty of Basic Science, Air Defence-Air Force Academy, Doai Phuong, Hanoi 100000, Vietnam; (2) Department of Theoretical Physics, Faculty of Physics, VNU University of Science, Vietnam National University, Hanoi 100000, Vietnam.

We present a theoretical study of the Peltier effect in two-dimensional graphene under influence of intense electromagnetic wave using the quantum kinetic equation method. Assuming electron-optical phonon scattering as the dominant scattering mechanism, analytical expressions for the kinetic transport tensors σ_xx , ζ_xx and the Peltier coefficient (PC) are derived, revealing their dependence on the external magnetic field, the frequency of the intense electromagnetic wave, and temperature. Numerical results show that the Peltier coefficient displays pronounced resonance peaks in its dependence on cyclotron energy and electromagnetic-wave frequency. These peaks emerge when the energies associated with Landau quantization, optical phonons, and the electromagnetic wave satisfy the magneto–phonon–photon resonance condition. For the cyclotron-energy dependence, resonance peaks involving photon emission shift toward lower energies, whereas those involving photon absorption shift toward higher energies. In contrast, resonance peaks involving only electron–phonon scattering remain fixed. Temperature modifies the peak amplitudes without significantly affecting their positions, and no resonance behavior is found in the temperature dependence of the Peltier coefficient. The present results may provide a theoretical basis for future experimental studies of thermoelectric transport in graphene subjected to intense electromagnetic radiation and quantizing magnetic fields.

Presenter: Nguyen Thu Huong