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

Hugo Tschirhart, Ernest T. S. Ong, Pinaki Sengupta, and Thomas L. Schmidt
Phys. Rev. B 100, 195111 – Published 8 November 2019

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.

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  • Received 27 November 2018
  • Revised 17 October 2019

DOI:https://doi.org/10.1103/PhysRevB.100.195111

©2019 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Hugo Tschirhart1, Ernest T. S. Ong2, Pinaki Sengupta2, and Thomas L. Schmidt1,*

  • 1Physics and Materials Science Research Unit, University of Luxembourg, 1511 Luxembourg, Luxembourg
  • 2School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371

  • *thomas.schmidt@uni.lu

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Vol. 100, Iss. 19 — 15 November 2019

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