Hu, Xiao2004-12-032004-12-0320012001http://hdl.handle.net/2003/69010.17877/DE290R-3599enThe American Physical SocietyPhysical Review Letters530Bicritical and Tetracritical Phenomena and Scaling Properties of the SO(5) Theory10.1103/PhysRevLett.87.057004article (journal)