New skyrmions in the attractive Hubbard
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W.Vincent Liu
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Article
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1999
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Elsevier Science
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English
β 66 KB
The coexistence of superconducting and charge-density-wave order in the half-filled attractive Hubbard model is Ε½ . Ε½ . interpreted as a consequence of the pseudospin SU 2 symmetry spontaneously broken to a 'hidden' subgroup U 1 . By topological arguments we show that there must exist new skyrmion t