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Staggered Currents in the Mixed State
The current pattern in the mixed state of high-T(c) superconductors is studied in the U(1) mean-field theory of the t-J model. Assuming the absence of spin antiferromagnetism we find (1) at moderate doping staggered-current pattern exists in vortex cores and eventually percolates with increasing magnetic field. (2) The polarity of …