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arXiv 2008.09923cond-mat.str-el
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α- RuCl3的场致低温热弹性和磁弹性性质

Thermal and magnetoelastic properties of α-RuCl3 in the field-induced low temperature states

Rico Schönemann, Shusaku Imajo, Franziska Weickert, Jiaqiang Yan, David G. Mandrus, Yasumasa Takano, Eric L. Brosha, Priscila F. S. Rosa, Stephen E. Nagler, Koi… 展开作者

Rico Schönemann, Shusaku Imajo, Franziska Weickert, Jiaqiang Yan, David G. Mandrus, Yasumasa Takano, Eric L. Brosha, Priscila F. S. Rosa, Stephen E. Nagler, Koichi Kindo, Marcelo Jaime

摘要:

我们讨论了新的磁热,热膨胀和磁致伸缩数据在$α$ -RuCl $_{3}$单晶的温度场相图上的影响,并揭示了磁场依赖的表观能隙结构$Δ(H)$,当低温反铁磁秩序被抑制。我们发现,根据如何模拟的热膨胀数据,$Δ(H)$可以表现出立方场的依赖性,并保持有限的零场,与纯Kitaev模型主办巡回马约拉纳费米子和本地化$\mathbb{Z}_{2}$通量一致。我们的磁热效应数据提供了,低于$1\,\mathrm{K}$,明确的证据耗散现象在$H_{\mathrm{c}}$,吸烟枪的一阶相变。另一方面,我们的研究结果表明,从QSL到极化顺磁态以上$H_{\mathrm{c}}$的相变的支持很少。

英文摘要:

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 $H_{\mathrm{c}}$.

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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