发表机构
Wuhan National High Magnetic Field Center and School of Physics, Huazhong University of Science and Technology; Institute of Physics, Chinese Academy of Sciences; Songshan Lake Materials Laboratory（华中科技大学物理学院及武汉国家强磁场中心; 中国科学院物理研究所; 松山湖材料实验室）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本研究通过$^{139}$La核四极共振实验，发现La$_4$Ni$_3$O$_{10}$中自旋与电荷密度波相互交织且与超导竞争，并揭示了压力下转变温度的降低规律。
AI 中文摘要
密度波（DW）序被认为是非常规超导性的竞争序，常见于多种超导体中，包括但不限于最近发现的Ruddlesden-Popper相镍氧化物。通过利用$^{139}$La核四极共振，我们系统地研究了La$_4$Ni$_3$O$_{10}$中DW序的性质及其在压力下的演化。在该材料中发现自旋和电荷DW序相互交织，这与La$_3$Ni$_2$O$_7$中的情况形成鲜明对比。在约150 K处观察到短程DW序，远高于约139 K处出现的远程DW序。当施加2.3 GPa的静水压力时，短程和远程序的转变温度分别以1 K/GPa和10 K/GPa的速率降低。因此，我们的结果证实了自旋密度波和电荷密度波均作为与La$_4$Ni$_3$O$_{10}$中超导态竞争的序，并为DW序与非常规超导性之间的相互作用提供了新的见解。
英文摘要
Density-wave (DW) orders are considered as competing orders to unconventional superconductivity and are commonly seen in a variety of superconductors including but not limited to the recently discovered Ruddlesden-Popper-phase nickelates. By utilizing $^{139}$La nuclear quadrupole resonance, we systematically investigate into the nature of DW orders and their evolution under pressure in La$_4$Ni$_3$O$_{10}$. Spin and charge DW orders are found to be intertwined in this material, which is in stark contrast to those in La$_3$Ni$_2$O$_7$. Short-range DW orders are observed near 150 K, well above the development of long-range DW orders at around 139 K. Upon applying a hydrostatic pressure of 2.3 GPa, the transition temperatures of the short-range and long-range orders decrease at rates of 1 K/GPa and 10 K/GPa, respectively. Our results thus affirm that both spin density wave and charge density wave as competing orders with the superconducting state in La$_4$Ni$_3$O$_{10}$, and provide new insights into the interplay between DW orders and unconventional superconductivity.
Comments8+4 pages, 4+3 figures
