We report the evolution of the charge density wave (CDW) states in the quasi-two-dimensional rare-earth tritellurides ($R{\mathrm{Te}}_3$ for $R=\mathrm{Er}$, Tm) under the influence of in-plane uniaxial stress. Measurements of the elastocaloric effect, resistivity, and elastoresistivity allow us to demonstrate the importance of in-plane antisymmetric strain on the CDW and to establish a phase diagram. We show that modest tensile stress parallel to the in-plane $a$ axis can reversibly switch the direction of the ordering wave vector between the two in-plane directions, and present a free-energy expansion which reproduces the general structure of the observed phenomena. This work opens a new avenue in the study of $R{\mathrm{Te}}_3$ in its own right, and more generally establishes $R{\mathrm{Te}}_3$ as a promising model system for the study of strain-CDW interactions in a quasi-two-dimensional square lattice.

中文翻译：

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通过弹热和弹性电阻率测量在单轴应力下重新排列 ErTe3 和 TmTe3 中电荷密度波状态的证据

我们报告了准二维稀土三碲化物中电荷密度波（CDW）状态的演变（$R{碲}_3$为了$R=呃$, Tm) 在面内单轴应力的影响下。弹性热效应、电阻率和弹性电阻率的测量使我们能够证明平面内反对称应变对 CDW 的重要性并建立相图。我们展示了平行于平面内的适度拉伸应力$\mathrm{一个}$轴可以在两个面内方向之间可逆地切换有序波矢量的方向，并呈现再现观察现象的一般结构的自由能扩展。这项工作开辟了新的研究方向$R{碲}_3$就其本身而言，并且更普遍地建立$R{碲}_3$作为研究准二维方格中应变-CDW相互作用的有前途的模型系统。