Phys. Rev. B 58, 443 (1998) - SO(5) symmetric ladder

SO(5) symmetric ladder

D. Scalapino, Shou-Cheng Zhang, and W. Hanke

Phys. Rev. B 58, 443 – Published 1 July 1998

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 $π$ resonance mode of the $d$ -wave pairing phase is discussed. We also present the exact ground state for an SO(5) superspin model.

Received 19 November 1997

DOI:https://doi.org/10.1103/PhysRevB.58.443

©1998 American Physical Society

Authors & Affiliations

Department of Physics, University of California, Santa Barbara, California 93106

Shou-Cheng Zhang

Department of Physics, Stanford University, Stanford, California 94305

Institut für Theoretische Physik, Am Hubland, D-97074 Würzburg, Federal Republic of Germany

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Issue

Vol. 58, Iss. 1 — 1 July 1998

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