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cond-mat.str-el2026
Direct Charge-4e Superconductivity by Mobilizing Bound Quartets
Jin-Tao Jin, Pengfei Li, Yi Zhou
A direct charge-\(4e\) superconductor exhibits coherent four-electron order without condensation in any charge-\(2e\) pairing channel. We establish three complementary results. Fir…
cond-mat.str-el2026
Topological Defects in Triple- Magnetic Orders: A Fixed-Lattice Homotopy Classification
Jin-Tao Jin, Yi Zhou
Multiple- magnetic orders combine continuous spin rotations with discrete crystalline sectors associated with translations and point-group transformations, producing a richer de…