Quantitative test of SO(5) symmetry in the vortex state of Nd(1.85)Ce(0.15)CuO4.
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.
Chen
Han-Dong
HD
Department of Applied Physics, McCullough Building, Stanford University, Stanford, California 94305, USA.
Wu
Congjun
C
Zhang
Shou-Cheng
SC