Coupling trilayer TI film with z-oriented d-wave altermagnet gaps helical edges while preserving two Weyl points, yielding 2D higher-order Weyl semimetals with corner states.
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Two-dimensional higher-order Weyl semimetals
Coupling trilayer TI film with z-oriented d-wave altermagnet gaps helical edges while preserving two Weyl points, yielding 2D higher-order Weyl semimetals with corner states.