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arXiv:1811.08368 · Physical review. B./Physical review. B

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

Hugo Tschirhart, Ernest Teng Siang Ong, Pinaki Sengupta, Thomas L. Schmidt

Published Nov 8, 2019• 5 citations
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Abstract

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.

DOI
10.1103/physrevb.100.195111

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