Reentrance of the topological phase in a spin-1 frustrated Heisenberg chain
For the Haldane phase, the magnetic field usually tends to drive the system into a
topologically trivial phase. Here we report a novel reentrance of the Haldane phase at zero
temperature in the spin-1 antiferromagnetic Heisenberg model on a sawtooth chain. A
partial Haldane phase is induced by the magnetic field, which is the combination of the
Haldane state in one sublattice and a ferromagnetically ordered state in the other sublattice.
Such a partial Haldane phase should be protected by the bond centered inversion …
topologically trivial phase. Here we report a novel reentrance of the Haldane phase at zero
temperature in the spin-1 antiferromagnetic Heisenberg model on a sawtooth chain. A
partial Haldane phase is induced by the magnetic field, which is the combination of the
Haldane state in one sublattice and a ferromagnetically ordered state in the other sublattice.
Such a partial Haldane phase should be protected by the bond centered inversion …
For the Haldane phase, the magnetic field usually tends to drive the system into a topologically trivial phase. Here we report a novel reentrance of the Haldane phase at zero temperature in the spin-1 antiferromagnetic Heisenberg model on a sawtooth chain. A partial Haldane phase is induced by the magnetic field, which is the combination of the Haldane state in one sublattice and a ferromagnetically ordered state in the other sublattice. Such a partial Haldane phase should be protected by the bond centered inversion symmetry, and is a result of the zero-temperature entropy due to quantum fluctuations and geometrical frustration.
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