Phase diagram of spin-1 chains with Dzyaloshinskii-Moriya interaction

We investigate an antiferromagnetic spin-1 Heisenberg chain in the presence of Dyzaloshinskii-Moriya interactions (DMI) and an external magnetic field. We study the resulting spin chain using a combination of numerical and analytical techniques. Using DMRG simulations to determine the spectral gap a...

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Bibliographic Details
Published in:Physical review. B 2019-11, Vol.100 (19), Article 195111
Main Authors: Tschirhart, Hugo, Ong, Ernest T. S., Sengupta, Pinaki, Schmidt, Thomas L.
Format: Article
Language:English
Subjects:
Antiferromagnetism
Chains
Computer simulation
Entanglement
Field strength
Magnetic fields
Mapping
Phase diagrams
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Summary:We investigate an antiferromagnetic spin-1 Heisenberg chain in the presence of Dyzaloshinskii-Moriya interactions (DMI) and an external magnetic field. We study the resulting spin chain using a combination of numerical and analytical techniques. Using DMRG simulations to determine the spectral gap and the entanglement spectrum, we map out the phase diagram as a function of magnetic field strength and DMI strength. We provide a qualitative interpretation for these numerical findings by mapping the spin-1 chain on a spin-1/2 ladder and using a bosonization approach.
ISSN:2469-9950
2469-9969
DOI:10.1103/PhysRevB.100.195111