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首页> 外文期刊>Physical review.B.Condensed matter and materials physics >Staggered flux state for rectangular-lattice spin-1/2 Heisenberg antiferromagnets
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Staggered flux state for rectangular-lattice spin-1/2 Heisenberg antiferromagnets

机译：矩形晶格旋转的交错磁通状态-1 / 2 Heisenberg反霉菌

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摘要

We investigate the spin-1/2 Heisenberg model on a rectangular lattice, using the Gutzwiller projected variational wave function known as the staggered flux state. Using Monte Carlo techniques, the variational parameters and instantaneous spin-spin correlation function for different coupling anisotropies γ =J_y/J_x are calculated. We observe a gradual evolution of the ground state energy towards a value which is very close to the one-dimensional (1D) estimate provided by the Bethe ansatz. and a good agreement between the finite-size scaling of the energies. The spin-spin correlation functions exhibit a power-law decay with varying exponents for different anisotropies. Though the lack of Neel order makes the staggered flux state energetically unfavorable in the symmetric case γ = 1, it appears to capture the essence of the system close to 1D. Hence we believe that the staggered flux state provides an interesting starting point to explore the crossover from quantum disordered chains to the Neel ordered two-dimensional square lattices.
机译：我们使用称为交错磁通状态的Gutzwiller投影变分波函数调查矩形晶格上的Spin-1/2 Heisenberg模型。使用Monte Carlo技术，计算不同耦合各向异性γ= J_Y / J_X的变分参数和瞬时自旋旋转相关函数。我们观察地面状态能量朝向非常接近贝特ansatz提供的一维（1D）估计的值的逐渐演变。和能量的有限尺寸缩放之间的良好一致性。自旋旋转相关功能表现出具有不同各向同性的不同指数的动力法衰减。虽然缺乏Neel订单使得在对称情况下能够在对称情况下能够充分地使交错的磁通状态γ= 1，但它似乎捕获了靠近1D的系统的本质。因此，我们相信交错的助焊剂状态提供了一个有趣的起点，以探索从量子无序链到Neel订购的二维方形格子的交叉。

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    《Physical review.B.Condensed matter and materials physics》 |2020年第21期|214413.1-214413.7|共7页
  • 作者

    N. E. Shaik; B. Dalla Piazza; D. A. Ivanov; H. M. Ronnow;

  • 作者单位

    Ecole Polytechnique Federale de Lausanne ( EPFL) Institute of Condensed Matter Physics CH-1015 Lausanne Switzerland;

    Ecole Polytechnique Federale de Lausanne ( EPFL) Institute of Condensed Matter Physics CH-1015 Lausanne Switzerland;

    Institute for Theoretical Physics ETH Zuerich CH-8093 Zuerich Switzerland;

    Ecole Polytechnique Federale de Lausanne ( EPFL) Institute of Condensed Matter Physics CH-1015 Lausanne Switzerland;

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