Abstract：
The rare-earth telluride compound EuTe4 exhibits a charge density wave (CDW) and an unconventional thermal hysteresis transition. Herein, we report a comprehensive study of the CDW states in EuTe4 by using low-temperature scanning tunneling microscopy. Two types of charge orders are observed at 4 K, including a newly discovered spindle-shaped pattern and a typical stripe-like pattern. As an exotic charge order, the spindle-shaped CDW is off-axis and barely visible at 77 K, indicating that it is a hidden order developed at low temperature. Based on our first-principles calculations, we reveal the origins of the observed electronic instabilities. The spindle-shaped charge order stems from a subsequent transition based on the stripe-like CDW phase. Our work demonstrates that the competition and cooperation between multiple charge orders can generate exotic quantum phases.
摘要：
稀土碲化物化合物EuTe4表现出电荷密度波（CDW）和非常规的热滞后转变。在这里，我们报告了通过使用低温扫描隧道显微镜对EuTe4中的CDW状态进行的全面研究。在4K时观察到两种类型的电荷顺序，包括新发现的纺锤形图案和典型的条纹状图案。作为一个异国情调的收费命令，纺锤形CDW离轴，在77K时几乎看不见，这表明它是在低温下形成的隐藏秩序。根据我们的第一原理计算，我们揭示了所观察到的电子不稳定性的起源。纺锤形电荷顺序源于基于条纹状CDW相的后续过渡。我们的工作表明，多个电荷阶数之间的竞争和合作可以产生奇异的量子相。
