Diamond chains with multiple-spin exchange interactions

Abstract

We study the phase diagram of a symmetric spin-1/2 Heisenberg diamond chain with additional cyclic four-spin exchange interactions. The presented analysis supplemented by numerical exact-diagonalization results for finite periodic clusters implies a rich phase diagram containing, apart from standard magnetic and spin-liquid phases, two different tetramer-dimer phases as well as an exotic four-fold degenerate dimerized phase. The characteristics of the established spin phases as well as the nature of quantum phase transitions are discussed, as well.

6 PRB pages, Added references

References in corpus (5)

• Evidence for deconfined quantum criticality in a two-dimensional Heisenberg model with four-spin interactions
• Phase Diagram of a Spin Ladder with Cyclic Four Spin Exchange
• Frustration Induced Quantum Phases in Mixed Spin Chain with Frustrated Side Chains
• Thermodynamics of antiferromagnetic alternating spin chains
• Ferrimagnetic and Long Period Antiferromagnetic Phases in High Spin Heisenberg Chains with D-Modulation