Odd-integer (meronic) Euler phases in C2T-symmetric three-band systems occur only when the Brillouin zone boundary conditions are non-trivial and anisotropic, and quench dynamics reveals these obstructions through linked inverse images across adjacent Brillouin zones.
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Non-periodic Boundary Conditions for Euler Class and Dynamical Signatures of Obstruction
Odd-integer (meronic) Euler phases in C2T-symmetric three-band systems occur only when the Brillouin zone boundary conditions are non-trivial and anisotropic, and quench dynamics reveals these obstructions through linked inverse images across adjacent Brillouin zones.