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arXiv 1706.02421cond-mat.str-el
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kagome晶格上耦合链的无带隙手征自旋液体

Gapless chiral spin liquid from coupled chains on the kagome lattice

Rodrigo G. Pereira, Samuel Bieri

摘要:

利用微扰重整化群方法,我们证明了具有交错手征相互作用的kagome晶格上的扩展($J_1$-$J_2$ - $J_d$)海森堡模型($J_χ$)可以呈现无隙手征量子自旋液体相.在耦合链结构中,这个相可以理解为手性滑动Luttinger液体,沿着链方向具有自旋相关的代数衰减。我们使用有效场论计算了这种无带隙的手征自旋液体的低能性质,并表明它们与部分子平均场论的预测是兼容的。这些结果可能与在钾霞石材料中观察到的状态有关。

英文摘要:

Using a perturbative renormalization group approach, we show that the extended ($J_1$-$J_2$-$J_d$) Heisenberg model on the kagome lattice with a staggered chiral interaction ($J_χ$) can exhibit a gapless chiral quantum spin liquid phase. Within a coupled-chains construction, this phase can be understood as a chiral sliding Luttinger liquid with algebraic decay of spin correlations along the chain directions. We calculate the low-energy properties of this gapless chiral spin liquid using the effective field theory and show that they are compatible with the predictions from parton mean-field theories with symmetry-protected line Fermi surfaces. These results may be relevant to the state observed in the kapellasite material.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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