Quantum phase transitions in the spin-1 Kitaev-Heisenberg chain
- URL: http://arxiv.org/abs/2009.14159v1
- Date: Tue, 29 Sep 2020 17:09:44 GMT
- Title: Quantum phase transitions in the spin-1 Kitaev-Heisenberg chain
- Authors: Wen-Long You and Gaoyong Sun and Jie Ren and Wing Chi Yu and Andrzej
M. Ole\'s
- Abstract summary: 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.
Aquantum spin liquid is stable near the Kitaev limit, while a topological Haldane phase is found for $J>0$.
- Score: 1.438268707994694
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- 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 $\langle S_i^zS_{i+1}^z\rangle>0$ and an
intermediate left-left-right-right phase with $\langle
S_i^xS_{i+1}^x\rangle\neq 0$. A~quantum spin liquid is stable near the Kitaev
limit, while a topological Haldane phase is found for $J>0$.
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