Quantitative test of SO(5) symmetry in the vortex state of Nd(1.85)Ce(0.15)CuO4 |
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Authors: | Chen Han-Dong Wu Congjun Zhang Shou-Cheng |
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Affiliation: | Department of Applied Physics, McCullough Building, Stanford University, Stanford, California 94305, USA. |
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Abstract: | By numerically solving models with competing superconducting and antiferromagnetic orders, we study the magnetic field dependence of the antiferromagnetic moment in both the weak and strong field regimes. Through a comparison with the neutron scattering results of Kang et al. and Matsuura et al. on Nd(1.85)Ce(0.15)CuO4, we conclude that this system is close to a SO(5) symmetric critical point. We also make a quantitative prediction on increasing the upper critical field B(c2) and the superconducting transition temperature T(c) by applying an in-plane magnetic field. |
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