巴塞尔大学和慕尼黑工业大学的研究人员开发了一套创新方法，借助光学探测技术观察Wigner晶体内电子的集体运动。[1]Wigner晶体是由电子自组织形成的晶体结构，研究团队通过对原子层厚度的二硫化钨材料照射光线，成功捕捉到光学信号能够揭示这种电子晶体的结构与内部动态行为。[1]
研究采用的实验条件极其苛刻，材料温度接近绝对零度，仅高几度。[1]关键发现在于Wigner晶体极化子通过光生激子与晶体中电子集体运动的耦合而形成。[1]这一发现为研究强关联量子物质开辟了新工具。[1]该成果由Dr. Lujun Wang（巴塞尔大学）作为第一作者发表，Professor Tomasz Smoleński（巴塞尔大学）担任通讯作者，Professor Michael Knap（慕尼黑工业大学）领导理论研究团队，已刊登于《Nature Physics》期刊。[1]
Researchers from the University of Basel and the Technical University of Munich have developed a novel optical detection method to observe the collective motion of electrons within Wigner crystals, exotic crystalline structures formed by electrons organizing themselves.[1] By illuminating atomically thin tungsten disulfide material with light, the team discovered that optical signals can unveil both the structure of electron crystals and their internal dynamic behavior, offering new tools for studying strongly correlated quantum matter.[1]
The experiment was conducted at temperatures only a few degrees above absolute zero using single-layer tungsten disulfide as the experimental material.[1] The researchers found that Wigner crystal polaritons form through the coupling of photogenerated excitons with collective electron motion within the crystal.[1] Led by Dr. Lujun Wang as the first author and Professor Tomasz Smoleński as the corresponding author at the University of Basel, with theoretical contributions from Professor Michael Knap at the Technical University of Munich, the findings were published in Nature Physics in 2026.[1]