Thermal radiation property of semi-Dirac system and its modulation by antiferromagnetic exchange field

The semi-Dirac system possesses a unique band structure, endowing it with many intriguing physical properties. This study employs the tight-binding approximation to theoretically investigate the longitudinal conductivity, radiation spectrum, and total energy radiation of semi-Dirac materials. The thermal radiation properties are modulated by applying an antiferromagnetic field. The study reveals that the conductivity of the semi-Dirac system exhibits anisotropy, and its radiation spectrum follows Wien's displacement law. Although its far-field thermal radiation is lower than that of blackbody radiation at the same temperature. It adheres to the Stefan-Boltzmann law. The strength of the antiferromagnetic exchange field significantly affects the conductivity of the semi-Dirac system, particularly in the low-energy region, thereby influencing its energy radiation and emissivity. © 2024