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cond-mat.str-el2025
Multipole phases in a type of spin ladders with local conserved quantities and generalizations
Jianlong Fu
We study spin ladder models with exact multipole phases, which are traditional spin phases formed by multipole moments. These phases feature non-trivial order with zero magnetizati…
cond-mat.str-el2025
Anomalous Landau levels and quantum oscillation in rotation-invariant insulators
Jianlong Fu, Chun Yu Weng, Hoi Chun Po
Landau levels in certain models are known to protrude into the zero-field energy gap. These are known as anomalous Landau levels (ALLs). We study whether ALLs can lead to Fermi-sur…