Altermagnetism-induced higher-order topological Dirac semimetals in two-dimensional nonsymmorphic systems

Lizhou Liu, Cheng-Ming Miao, Ying-Tao Zhang +1

We propose an altermagnetism-induced route to a two-dimensional higher-order topological Dirac semimetal in a trilayer nonsymmorphic Dirac system. Interlayer hybridization preserve…