论文标题
α-Rucl3在田间诱导的低温状态中的热和磁弹性性能
Thermal and magnetoelastic properties of α-RuCl3 in the field-induced low temperature states
论文作者
论文摘要
我们讨论了以下含义：$α$ -rucl $ _ {3} $单晶在其温度场相图上具有新的磁电，热膨胀和磁截图数据，并揭示了在低温抗Fertifermagnetic订购时发挥作用的明显能隙结构$Δ（H）$的磁场依赖性。我们表明，根据如何建模热扩展数据，$δ（h）$可以显示一个立方场依赖性并保持在零场的有限，这与纯kitaev型号托管了巡回介绍的Majorana fermions和本地化的$ \ Mathbb {z} _ {2} $ fluxes $ fluxes。我们的磁化效应数据提供了低于$ 1 \，\ Mathrm {k} $，在$ h _ {\ mathrm {c}} $上的耗散现象的明确证据，吸烟枪以进行一阶相位过渡。另一方面，我们的结果几乎没有对从QSL到$ H _ {\ Mathrm {C}} $的两极分化的顺磁性状态的相位过渡。
We discuss the implications that new magnetocaloric, thermal expansion and magnetostriction data in $α$-RuCl$_{3}$ single crystals have on its temperature-field phase diagram and uncover the magnetic-field dependence of an apparent energy gap structure $Δ(H)$ that evolves when the low temperature antiferromagnetic order is suppressed. We show that, depending on how the thermal expansion data is modeled, $Δ(H)$ can show a cubic field dependence and remain finite at zero field, consistent with the pure Kitaev model hosting itinerant Majorana fermions and localized $\mathbb{Z}_{2}$ fluxes. Our magnetocaloric effect data provides, below $1\,\mathrm{K}$, unambiguous evidence for dissipative phenomena at $H_{\mathrm{c}}$, smoking gun for a first order phase transition. Our results, on the other hand, show little support for a phase transition from a QSL to a polarized paramagnetic state above $H_{\mathrm{c}}$.
