• 文献标题:   Substantially Enhancing Quantum Coherence of Electrons in Graphene via Electron-Plasmon Coupling
  • 文献类型:   Article
  • 作  者:   CHENG GH, QIN W, LIN MH, WEI LM, FAN XD, ZHANG HY, GWO S, ZENG CG, HOU JG, ZHANG ZY
  • 作者关键词:  
  • 出版物名称:   PHYSICAL REVIEW LETTERS
  • ISSN:   0031-9007 EI 1079-7114
  • 通讯作者地址:   Univ Sci Technol China
  • 被引频次:   4
  • DOI:   10.1103/PhysRevLett.119.156803
  • 出版年:   2017

▎ 摘  要

The interplays between different quasiparticles in solids lay the foundation for a wide spectrum of intriguing quantum effects, yet how the collective plasmon excitations affect the quantum transport of electrons remains largely unexplored. Here we provide the first demonstration that when the electronplasmon coupling is introduced, the quantum coherence of electrons in graphene is substantially enhanced with the quantum coherence length almost tripled. We further develop a microscopic model to interpret the striking observations, emphasizing the vital role of the graphene plasmons in suppressing electron-electron dephasing. The novel and transformative concept of plasmon-enhanced quantum coherence sheds new insight into interquasiparticle interactions, and further extends a new dimension to exploit nontrivial quantum phenomena and devices in solid systems.