Weyl Spin Liquids
Weyl Spin Liquids
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DOI：
10.1103/physrevlett.114.157202
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发表时间：
2015-04-15
影响因子：
8.6
通讯作者：
Trebst, S.
中科院分区：
文献类型：
--
作者：
Hermanns, M.;O'Brien, K.;Trebst, S.
相互作用的量子多体系统中量子数的分数化是凝聚态物理中的一个中心主题，其突出的例子包括量子霍尔液体中电子的分数化或自旋冰材料中磁单极子的出现。在这里，我们讨论了三维Kitaev模型中磁矩的分数化为马约拉纳费米子（和aZ(2)规范场）以及它们的涌现集体行为。我们分析证明了在最近合成的β - li2iro3的超蜂窝结构上，当施加磁场时，Majorana费米子在Kitaev模型中形成Weyl超导体。我们描述了这种状态的拓扑保护体和表面特征，我们称之为Weyl自旋液体，包括热力学和输运特征。
The fractionalization of quantum numbers in interacting quantum many-body systems is a central motif in condensed-matter physics with prominent examples including the fractionalization of the electron in quantum Hall liquids or the emergence of magnetic monopoles in spin-ice materials. Here, we discuss the fractionalization of magnetic moments in three-dimensional Kitaev models into Majorana fermions (and aZ(2) gauge field) and their emergent collective behavior. We analytically demonstrate that the Majorana fermions form a Weyl superconductor for the Kitaev model on the recently synthesized hyperhoneycomb structure of beta-Li2IrO3 when applying a magnetic field. We characterize the topologically protected bulk and surface features of this state, which we dub a Weyl spin liquid, including thermodynamic and transport signatures.