Frustration Induced Quantum Phases in Mixed Spin Chain with Frustrated Side Chains

Details Frustration Induced Quantum Phases in Mixed Spin Chain with Frustrated Side Chains Frustration Induced Quantum Phases in Mixed Spin Chain with Frustrated Side Chains

2008-05-23

arxiv.org/abs/0805.3604v2

Phys. Rev. B 78, 064407 (2008)

Physics

Condensed Matter

Strongly Correlated Electrons

10 pages, 18 figures

Scientific paper

10.1103/PhysRevB.78.064407

A mixed Heisenberg spin chain with frustrated side chains is investigated by numerical and perturbational calculations. A frustration-induced quantum partially polarized ferrimagnetic phase and a nonmagnetic spin quadrupolar phase are found adjacent to the conventional Lieb-Mattis type ferrimagnetic phase or the nonmagnetic singlet cluster solid phases. The partially polarized ferrimagnetic phase has an incommensurate spin structure. Similar structures are commonly found in other frustration-induced partially polarized ferrimagnetic phases. Numerical results also suggest a series of almost critical nonmagnetic ground states in a highly frustrated regime if the side chain spins weakly couple to the main chain.

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