Group 1 - The axion is a hypothetical particle proposed to solve the strong CP problem in quantum chromodynamics, introduced by theorists Frank Wilczek and Steven Weinberg in 1978 [1][3] - Axions are extremely difficult to detect due to their weak interaction with other particles, yet they are considered a significant component of dark matter in the universe [4][6] - Recent advancements suggest that axions can exist in a quasi-particle form within solid-state materials, referred to as "axion insulators," which exhibit unique magnetic and electric properties [7][8] Group 2 - The material MnBi2Te4 has been predicted to be an axion insulator, featuring a layered structure with alternating magnetic properties, which may allow for the observation of axion quasi-particles [9][11] - Experimental results published in April 2025 demonstrated periodic oscillations of the magnetic-electric coupling coefficient in MnBi2Te4, indicating the presence of axion-like behavior [11][13] - The discovery of axion quasi-particles opens new avenues for applications in condensed matter physics and could lead to programmable quantum devices for detecting dark matter [13]