An SO(5) Symmetric Ladder
D. Scalapino, Shou-Cheng Zhang, W. Hanke
TL;DR
This paper introduces an SO(5) symmetric electron model on a two-chain ladder, analyzes its phase diagram, and explores the connection between spin-gap magnons and d-wave pairing resonances, including an exact ground state solution.
Contribution
It presents a new SO(5) symmetric ladder model with local interactions, analyzes its phase diagram, and provides an exact ground state for an SO(5) superspin model.
Findings
Determined the ground state phase diagram in the strong-coupling limit.
Discussed the relationship between spin-gap magnon modes and d-wave pairing resonances.
Provided an exact ground state for an SO(5) superspin model.
Abstract
We construct an SO(5) symmetric electron model on a two-chain ladder with purely local interactions on a rung. The ground state phase diagram of this model is determined in the strong-coupling limit. The relationship between the spin-gap magnon mode of the spin-gap insulator and the resonance mode of the d-wave pairing phase is discussed. We also present the exact ground state for an SO(5) superspin model.
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