AI 中文总结
研究利用飞秒光谱学探究CeTe3的CDW序随压力的演化，发现压力升高会增强电子-声子耦合、抑制CDW序，还会诱导重电子行为，揭示了压力对该体系电子结构的调控机制。
AI 中文摘要
我们采用飞秒光谱学研究了原型电荷密度波（CDW）体系CeTe3在静水压下的相干序参量动力学演化。常压下CDW转变温度约为570 K，在约6 GPa时降至接近室温。序参量恢复动力学的压力依赖性表明，随压力增加电子-声子耦合增强，这意味着CDW的抑制主要由费米面嵌套的减少驱动。在7 GPa以上，低温下未观测到CDW序的证据。同时，弛豫动力学在低温下显著减慢，这与因压力增强局域Ce 4f能级与巡游载流子杂化而出现的重电子行为一致。
英文摘要
We use femtosecond optical spectroscopy to study the evolution of coherent order-parameter dynamics in the prototypical charge-density-wave (CDW) system CeTe3 under hydrostatic pressure. The CDW transition temperature decreases from approximately 570 K at ambient pressure to near room temperature at approximately 6 GPa. The pressure dependence of the order-parameter recovery dynamics indicates enhanced electron-phonon coupling with increasing pressure, implying that CDW suppression is driven predominantly by the reduction in Fermi-surface nesting. Above 7 GPa, no evidence of CDW order is observed down to cryogenic temperatures. Concurrently, the relaxation dynamics exhibit significant slowing down at low-temperatures, consistent with emerging heavy-electron behaviour due to pressure-enhanced hybridization between localized Ce 4f levels and itinerant carriers.
Comments26 pages, 5 figures
