Antiferromagnetic order in doped hubbard model under the magnetic field |
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Authors: | Seung-Pyo Hong Hyeonjin Doh Sung-Ho Suck Salk |
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Institution: | 1.Department of Physics,Pohang University of Science and Technology,Pohang,Korea |
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Abstract: | We investigate the effects of temperature and hole doping on the antiferromagnetic (AF) ground states by considering the system of electrons on a two dimensional square lattice under the external magnetic field. In the mean field calculation of Hubbard Hamiltonian we find out that the magnetic field suppresses the AF order in a unique manner for all parameter values ofT and δ. We obtained the phase diagram of AF order inT-δ plane as a function of Coulomb correlation strength and magnetic field. We find the reentrant behavior of AF order in both the absence and the presence of magnetic field. |
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