Ordered states in the Kitaev-Heisenberg model: From 1D chains to 2D honeycomb.
Ordered states in the Kitaev-Heisenberg model: From 1D chains to 2D honeycomb.
复制标题
DOI:
10.1038/s41598-018-19960-4
复制
发表时间:
2018-01-29
影响因子:
4.6
通讯作者:
Nishimoto S
中科院分区:
文献类型:
--
作者:
Agrapidis CE;van den Brink J;Nishimoto S
We study the ground state of the 1D Kitaev-Heisenberg (KH) model using the density-matrix renormalization group and Lanczos exact diagonalization methods. We obtain a rich ground-state phase diagram as a function of the ratio between Heisenberg (J = cosϕ) and Kitaev (K = sinϕ) interactions. Depending on the ratio, the system exhibits four long-range ordered states: ferromagnetic-z, ferromagnetic-xy, staggered-xy, Néel-z, and two liquid states: Tomonaga-Luttinger liquid and spiral-xy. The two Kitaev points and are singular. The ϕ-dependent phase diagram is similar to that for the 2D honeycomb-lattice KH model. Remarkably, all the ordered states of the honeycomb-lattice KH model can be interpreted in terms of the coupled KH chains. We also discuss the magnetic structure of the K-intercalated RuCl3, a potential Kitaev material, in the framework of the 1D KH model. Furthermore, we demonstrate that the low-lying excitations of the 1D KH Hamiltonian can be explained within the combination of the known six-vertex model and spin-wave theory.
登录
查看更多内容
影响因子:
--
作者:
Khaliullin, G
通讯作者:
Khaliullin, G
影响因子:
1.6
作者:
Mahdavifar, S.
通讯作者:
Mahdavifar, S.
影响因子:
8.6
作者:
Koitzsch, A.;Habenicht, C.;Doert, Th.
通讯作者:
Doert, Th.
影响因子:
8.6
作者:
Baek, S-H.;Do, S-H.;Buechner, B.
通讯作者:
Buechner, B.
影响因子:
3.7
作者:
Breznay, Nicholas P.;Ruiz, Alejandro;Analytis, James G.
通讯作者:
Analytis, James G.