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北美退伍军人节(Veterans Day),12 日无更新
arXiv 2006.04834cond-mat.str-el
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浮动拓扑相位

Floating topological phases

Trithep Devakul, S. L. Sondhi, S. A. Kivelson, Erez Berg

摘要:

虽然准二维(层状)材料可以是高度各向异性的,但它们的渐近长距离行为通常反映了物质的完全三维相的性质。然而,某些具有2+1维规范对称性的拓扑有序量子相可以渐近地不受面间耦合的影响。我们讨论了这种“浮动拓扑相位”的稳定性,以及它们的诊断通过一个非局部的序参量。这样的相可以产生层间与层内电阻率的发散比$ρ_{\perp}/ρ_{\parallel}$作为$T\to 0$,即使在$ρ_{\perp}$和$ρ_\parallel$两者单独发散的绝缘体中。实验观察到这种发散将构成拓扑(例如自旋液体)相存在的证据。

英文摘要:

While quasi-two-dimensional (layered) materials can be highly anisotropic, their asymptotic long-distance behavior generally reflects the properties of a fully three dimensional phase of matter. However, certain topologically ordered quantum phases with an emergent 2+1 dimensional gauge symmetry can be asymptotically impervious to interplane couplings. We discuss the stability of such "floating topological phases", as well as their diagnosis by means of a non-local order parameter. Such a phase can produce a divergent ratio $ρ_{\perp}/ρ_{\parallel}$ of the inter-layer to intra-layer resistivity as $T\to 0$, even in an insulator where both $ρ_{\perp}$ and $ρ_\parallel$ individually diverge. Experimental observation of such a divergence would constitute proof of the existence of a topological (e.g. spin liquid) phase.

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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