巴塞尔大学和慕尼黑工业大学的研究团队开发了一种新颖的光学方法，成功观察到了Wigner晶体内电子的集体运动1。研究人员将二硫化钨单原子层样品冷却至接近绝对零度的温度，通过光学探针检测到来自电子与光激发激子相互作用形成的混合准粒子的信号，从而揭示了电子在晶体中的排列方式及其集体运动方式1。
巴塞尔大学的Lujun Wang博士作为论文第一作者，与慕尼黑工业大学的Michael Knap教授所开发的理论模型密切配合，使得这一突破性观测成为可能1。相关研究成果已发表于《自然物理学》期刊1。
Scientists at the University of Basel and the Technical University of Munich have developed a novel optical method to observe the collective movement of electrons within a Wigner crystal, a strange electron configuration that emerges under extreme conditions 1. By probing a single-atom layer of tungsten disulfide cooled to just a few degrees above absolute zero, the research team detected optical signals that reveal how electrons arrange themselves and move together 1. These signals arise from hybrid quasiparticles formed when electrons interact with light-excited excitons 1.
The breakthrough, published in Nature Physics with DOI 10.1038/s41567-026-03395-0, marks a significant advance in understanding the collective dynamics of Wigner crystals at the microscopic scale 1. Led by doctoral researcher Lujun Wang from the University of Basel and developed with theoretical models by Professor Michael Knap from the Technical University of Munich, the study demonstrates how optical probes can unveil the structural arrangement and dynamical behavior of electrons in this exotic quantum state 1.
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