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Quantum Simulation

Quantum phase transitions in the spin-1 Kitaev-Heisenberg chain

arXiv
Authors: Wen-Long You, Gaoyong Sun, Jie Ren, Wing Chi Yu, Andrzej M. Oleś

Year

2020

Paper ID

20328

Status

Preprint

Abstract Read

~2 min

Abstract Words

118

Citations

N/A

Abstract

Recently, it has been proposed that higher-spin analogues of the Kitaev interactions K>0 may also occur in a number of materials with strong Hund's and spin-orbit coupling. In this work, we use Lanczos diagonalization and density matrix renormalization group methods to investigate numerically the S=1 Kitaev-Heisenberg model. The ground-state phase diagram and quantum phase transitions are investigated by employing local and nonlocal spin correlations. We identified two ordered phases at negative Heisenberg coupling J<0: a ferromagnetic phase with langle SizSi+1zrangle>0 and an intermediate left-left-right-right phase with langle SixSi+1xrangleneq 0. A quantum spin liquid is stable near the Kitaev limit, while a topological Haldane phase is found for J>0.

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  • This paper contributes to the Quantum Simulation research area in the Quantum Articles archive.
  • It adds a 2020 reference point for readers tracking recent quantum research.
  • Recently, it has been proposed that higher-spin analogues of the Kitaev interactions K>0 may also occur in a number of materials with strong Hund's and spin-orbit coupling.

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References & Citation Signals

[1] DOI https://doi.org/arXiv:2009.14159 [2] arXiv https://arxiv.org/abs/2009.14159 [3] Publisher https://arxiv.org/abs/2009.14159

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