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cond-mat.mes-hall2026
Geometric Spin Degeneracy in Spin-Orbit-Free Compensated Magnets
Seung Hun Lee, Yuting Qian, Xi Dai +1
Compensated magnets with vanishing net magnetization can exhibit both pronounced spin splitting and unconventional band degeneracies. In altermagnets, such degeneracies are enforce…
cond-mat.mes-hall2024
Unconventional topological phase transition of the Hopf insulator
Sunje Kim, Ysun Choi, Hyeongmuk Lim +1
The topological phase transition between two band insulators is mediated by a gapless state whose low-energy band structure normally contains sufficient information for describing…
cond-mat.mes-hall2023
Quantum geometric bound and ideal condition for Euler band topology
Soonhyun Kwon, Bohm-Jung Yang
Understanding the relationship between quantum geometry and topological invariants is a central problem in the study of topological states. In this work, we establish the relations…