Studies of a 2-Chain Spin Ladder with Frustrating Second Neighbor Interactions
Zheng Weihong, V. Kotov, J. Oitmaa (Univ. of New South Wales,, Australia)
TL;DR
This paper investigates a 2-chain spin-1/2 ladder with frustrating second neighbor interactions using multiple methods to determine its phase diagram, excitations, and correlations.
Contribution
It provides a comprehensive analysis of the phase diagram and excitation spectrum of the frustrated 2-chain spin ladder using series expansions, numerical diagonalization, and bosonization.
Findings
Phase diagram mapped out with various phases identified.
Dispersion relations for triplet excitations computed.
Pair correlations analyzed across different regimes.
Abstract
The Heisenberg model on a 2-chain spin-1/2 ladder with frustrating second neighbor interactions is studied by using series expansions about the Ising and dimer limits, numerical diagonalization, and by Abelian bosonization analysis. The phase diagram is determined, and pair correlations and the complete dispersion relations for the triplet spin-wave excitations are also computed.
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