Phys. Rev. Lett. 92, 107002 (2004) [4 pages]Quantitative Test of SO(5) Symmetry in the Vortex State of Nd1.85Ce0.15CuO4Received 21 May 2003; published 10 March 2004 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 Nd1.85Ce0.15CuO4, 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 Bc2 and the superconducting transition temperature Tc by applying an in-plane magnetic field. © 2004 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.92.107002
DOI:
10.1103/PhysRevLett.92.107002
PACS:
74.20.De, 74.25.Ha, 74.25.Op
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