论文标题
两个不同的电荷密度波顺序和加压中的新出现的超导性可爱
Two Distinct Charge Density Wave Orders and Emergent Superconductivity in Pressurized CuTe
论文作者
论文摘要
在超导粉末和Kagome CSV3SB5中发现了多个电荷密度波（CDW）订单，为研究CDW和超导性的相互作用提供了独特的环境，并改变了我们对其性质的看法。在这里，我们报告了一项高压研究，该研究通过超温度（400 mk）电运输和温度依赖性的拉曼光谱测量和第一原则计算，对准二维CDW材料可爱。我们提供了可靠的证据，表明原始的CDW顺序（CDW1）在〜6.5 GPA时转化为独特的CDW阶（CDW2）。计算表明，CDW1的驱动力是由于嵌套效应引起的，CDW2的驱动力可能是由于电子相关相互作用引起的。引人注目的是，使用圆顶样相图观察到压力诱导的超导性，其过渡将显示出从CDW1到CDW2的交叉范围的非凡拓宽。这些结果表明，加压可爱为理解多个CDW和超导性的复杂相互作用提供了一个有希望的操场。
The discovery of multiple charge-density-wave (CDW) orders in superconducting cuprates and Kagome CsV3Sb5 has offered a unique milieu for studying the interplay of CDW and superconductivity and altered our perspective on their nature. Here, we report a high-pressure study of quasi-one-dimensional CDW material CuTe through ultralow-temperature (400 mK) electrical transport and temperature-dependent Raman spectroscopy measurements and first-principles calculations. We provide solid evidence that the pristine CDW order (CDW1) transforms into a distinct CDW order (CDW2) at ~6.5 GPa. Calculations show that the driving force of CDW1 is due to the nesting effect and that of CDW2 probably arises from the electronic correlated interaction. Strikingly, pressure-induced superconductivity is observed with a dome-like phase diagram and its transition displays an extraordinary broadening along with the crossover from CDW1 to CDW2. These results demonstrate that pressurized CuTe provides a promising playground for understanding the intricated interplay of multiple CDWs and superconductivity.
