Antiferromagnetic Order in the Hubbard Model: Spin-Charge Rotating Reference Frame Approach

• Authors: T. Zaleski , T. Kopeć
• Languages of publication: EN

Abstracts

EN

We study the antiferromagnetic phase of three-dimensional Hubbard model with nearest neighbors hopping on a bipartite cubic lattice. We use the quantum SU(2)×U(1) rotor approach that yields a fully self-consistent treatment of the antiferromagnetic state that respects the symmetry properties of the model and satisfies the Mermin-Wagner theorem. As our theory describes the evolution from a Slater (U ≪ t) to a Mott-Heisenberg (U ≫ t) antiferromagnet, we present the phase diagram of the antiferromagnetic Hubbard model as a function of the crossover parameter U/t.

Keywords

EN

71.10.Fd; 75.10.Jm

Discipline

• 71.10.Fd: Lattice fermion models (Hubbard model, etc.)
• 75.10.Jm: Quantized spin models, including quantum spin frustration

• Journal: Acta Physica Polonica A
• Year: 2008
• Volume: 114
• Issue: 1
• Pages: 247-251

Dates

published

2008-07

received

2007-11-06

Contributors

author

T. Zaleski

• Institute of Low Temperature and Structure Research, Polish Academy of Sciences, P.O.B. 1410, 50-950 Wrocław 2, Poland

author

T. Kopeć

• Institute of Low Temperature and Structure Research, Polish Academy of Sciences, P.O.B. 1410, 50-950 Wrocław 2, Poland

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Identifiers

DOI

10.12693/APhysPolA.114.247