Observing quantum trapping on MoS2through the lifetimes of resonant electrons: Revealing the Pauli exclusion principle

Wei Bin Su*, Shin Ming Lu, Horng Tay Jeng, Wen Yuan Chan, Ho Hsiang Chang, Woei Wu Pai, Hsiang Lin Liu, Chia Seng Chang


研究成果: 雜誌貢獻期刊論文同行評審


We demonstrate that the linewidth of the field emission resonance (FER) observed on the surface of MoS2 using scanning tunneling microscopy can vary by up to one order of magnitude with an increasing electric field. This phenomenon originates from quantum trapping, in which the electron relaxed from a resonant electron in the FER is momentarily trapped in a potential well on the MoS2 surface due to its wave nature. Because the relaxed electron and the resonant electron have the same spin, through the action of the Pauli exclusion principle, the lifetimes of the resonant electrons can be substantially prolonged when the relaxed electrons engage in resonance trapping. The linewidth of the FER is thus considerably reduced to as narrow as 12 meV. The coexistence of the resonant electron and the relaxed electron requires the emission of two electrons, which can occur through the exchange interaction.

頁(從 - 到)5848-5856
期刊Nanoscale Advances
出版狀態已發佈 - 2020 十二月

ASJC Scopus subject areas

  • 工程 (全部)
  • 生物工程
  • 原子與分子物理與光學
  • 材料科學(全部)
  • 化學 (全部)


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