SUM(2)×UC(1) gauge symmetry in high-Tc superconductivity

Wei-Min Zhang

doi:10.1103/PhysRevB.65.104513

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SUM(2)×UC(1) gauge symmetry in high-Tc superconductivity

Wei-Min Zhang

DOI 10.1103/PhysRevB.65.104513 · Physical Review B

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Abstract

The square lattice structure of CuO2 layers and the strongly correlated property of electrons indicate that the high-Tc superconductivity in cuprates can be described by an intrinsic SOM(5) coherent pairing theory in which a SUM(2)×UC(1) gauge symmetry is embedded. Besides the usual charge order, this SUM(2)×UC(1) gauge symmetry is also related to three new magnetic-charge orders—the local AF magnet, the local spin current, and the d-wave charge order. These magnetic-charge orders are completely determined by the SOM(5) coherent pairing state. The magnetic and charge fluctuations that characterize the low-energy excitations in cuprates are then described by this gauge symmetry. Thus, the coexistence of antiferromagnetism and superconductivity can be realized naturally in a unified framework.