Ground-State Spin of Hubbard Ladder Model with Infinite Electron Repulsion

• Authors: V. Cheranovskii , E. Ezerskaya , D. Klein , V. Tokarev
• Languages of publication: EN

Abstracts

EN

We apply perturbation theory and cyclic spin permutation formalism to study the lowest energy states of the infinite-repulsion Hubbard model on n-leg ladders with alternating values of one-site energies α_{i} for neighboring rungs. We establish the "ferromagnetic" character of ladder ground-state at electron densities in the interval 1 - (2n)¯¹ ≤ ρ ≤ 1 and sufficiently large alternation of one-site energies of neighbor rungs of the ladder. We also show the stability of this state against the small deviations of the values of α_{i} in contrast to the case of two-leg ladder formed by weakly interacting neighbor rungs with equal one-site energies.

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

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2017
• Volume: 131
• Issue: 4
• Pages: 916-918

Dates

published

2017-04

Contributors

author

V. Cheranovskii

• V.N. Karazin Kharkiv National University, Svoboda Sq., 4, 61022 Kharkiv, Ukraine

author

E. Ezerskaya

• V.N. Karazin Kharkiv National University, Svoboda Sq., 4, 61022 Kharkiv, Ukraine

author

D. Klein

• Texas A&M University at Galveston, Galveston, TX, 77554 USA

author

V. Tokarev

• V.N. Karazin Kharkiv National University, Svoboda Sq., 4, 61022 Kharkiv, Ukraine

References

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Identifiers

DOI

10.12693/APhysPolA.131.916