论文标题
Dirac Spin液体中的近野签名：Chern-Simons fermionization之后的非亚伯隆化
Kondo signatures in Dirac spin liquids: Non-Abelian bosonization after Chern-Simons fermionization
论文作者
论文摘要
量子杂质用作沮丧的量子磁铁的原位探针，而狄拉克旋转液体是一类重要的量子自旋液体。在这里，我们提出了一种通用方法，即Chern-simons fermionization和Wess-Zumino-witten理论的组合，以研究Dirac Spin液体中的量子杂质。在Chern-simons fermionization下，显然抑制了量规波动，并且低能物理学由许多dirac山谷描述，这些迪拉克山谷依赖山谷依赖性伪蛋白 - 摩托杆锁定。 （2+1）d有效理论可以通过旋转对称性进一步降低到（1+1）d wess-zumino-witter理论中，其中dirac fermions和杂质之间的伪异种分解就可以通过非阿伯式的螺旋化解决。因此，根据狄拉克山谷之间杂质散射的相关性，分别确定了费米液体和非芬特液体的固定点。这导致了Dirac自旋液体的实验性指纹，包括伴有围绕的磁磁效应，交叉期间的非单调导热率和各向异性自旋相关函数。
Quantum impurities serve as in-situ probes of the frustrated quantum magnets, and Dirac spin liquids are an important class of quantum spin liquids. Here, we present a general method, a combination of the Chern-Simons fermionization and the Wess-Zumino-Witten theory, to study the quantum impurity in Dirac spin liquids. Under the Chern-Simons fermionization, the gauge fluctuations are apparently suppressed and the low-energy physics is described by a number of Dirac valleys with valley-dependent pseudospin-momentum locking. The (2+1)D effective theory can be further reduced into the (1+1)D Wess-Zumino-Witten theory by rotational symmetry, where the pseudospin-exchange between Dirac fermions and the impurity can then be solved by the non-Abelian bosonization. Consequently, fixed points of Fermi liquid and non-Fermi liquid are identified, respectively, depending on the relevance of the impurity scattering among the Dirac valleys. This leads to experimental fingerprints for Dirac spin liquids, including a Kondo-induced magneto-thermal effect, a non-monotonous thermal conductivity during the crossover, and an anisotropic spin correlation function.
