One-dimensional plasmon in an atomic-scale metal wire

Tadaaki Nagao, Shin Yaginuma, Takeshi Inaoka, Toshio Sakurai

Research output: Contribution to journalArticlepeer-review

95 Citations (Scopus)


We have measured one-dimensional (1D) plasmons in an atom wire array on the Si(557)-Au surface by inelastic scattering of a highly collimated slow electron beam. The angular dependence of the excitation energy clearly indicates the strong 1D confinement and free propagation of the plasma wave along the wire. The observed plasmon dispersion is explained very well by a quantum-mechanical scheme which takes into account dynamic exchange-correlation effects, interwire interactions, and spin-orbit splitting of the 1D bands. Although the qualitative feature of the plasmon dispersion is reminiscent of that of a high-density free-electron gas, we detected the substantial influence of electron correlation due to strong 1D confinement.

Original languageEnglish
Article number116802
JournalPhysical review letters
Issue number11
Publication statusPublished - 2006
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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