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STABILITY AND SPIN DENSITY WAVE IN POLYMERIC HUBBARD CHAINS

Y. F. DUAN

Department of Physics, Huazhong University of Science Technology, Wuhan 430074, China

Department of Basic Sciences, Air Force Radar Academy, Wuhan 430019, China

Corresponding author.

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Z. L. LIU

Department of Physics, Huazhong University of Science Technology, Wuhan 430074, China

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, and

K. L. YAO

Department of Physics, Huazhong University of Science Technology, Wuhan 430074, China

International Center of Material Physics, Chinese Academy of Sciences, Shenyang 110015, China

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https://doi.org/10.1142/S0217979205031365Cited by:1 (Source: Crossref)

Abstract

The ground state properties and spin-density wave of polymeric Hubbard chains are studied by means of the mean-field theory. It is shown that topological structure of the chain possesses a flat-band structure of the energy band. Our analysis shows that the on- site Coulomb repulsion of electrons in the chain leads to the coexistence of ferromagnetic and antiferromagnetic order, i,e., the ferrimagnetic order. Away from half filling, the system displays magnetic phase separation. Possible experimental realizations are suggested.

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