交错磁研究进展:材料物性与交叉应用OA

As an emerging magnetic phase distinct from traditional ferromagnetism and antiferromagnetism,altermagnetism has garnered significant attention due to its combining zero net magnetization with momentum-dependent spin splitting.This paper provides a comprehensive analysis of the field based on spin-group symmetry theory to elucidate the unique electronic structure in which time-reversal symmetry breaking and crystal rotation operations occur,rather than translation or inverse,enhancing Kramer degeneracy without the need for relativistic spin-orbit coupling.The experimental aspects are surveyed using representative systems such as MnTe,CrSb,and RuO2.The progress of growing high-quality films through molecular beam epitaxy(MBE)and magnetron sputtering is described in detail,as well as the direct visualization of giant band splitting and domain textures by using angle-resolved photoemission spectroscopy(ARPES)and photoemission electron microscopy(PEEM).Furthermore,the mechanism for manipulating Néel vector is systematically examined,with a focus on strategies involving current-induced spin-splitting torque(SST),lattice strain engineering,and thermal modulation,enabling efficient readout and writing of magnetic states.In addition to the basic properties,the discussion extends to the frontier of material exploration,including metal,two-dimensional and superconducting altermagnets,and evaluation of their transformative potential in high-density magnetic random-access memory(MRAM),topological spintronics,and ultrafast magnonics.The review ultimately identifies the current challenges in material expansion and interface engineering,outlining a roadmap for transitioning altermagnets from fundamental discoveries to practical applications in the next-generation information technology.