Edge magnetoplasma-like resonance in two-dimensional electrons on the surface of 3He-4He liquid mixtures

Hanako Isshiki, Yoshiyuki Shibayama, Keiya Shirahama

Research output: Contribution to journalConference articlepeer-review

1 Citation (Scopus)


We have observed unexpected resonance phenomena in two-dimensional electron system formed on the free surface of dilute 3He-4He liquid mixtures (with 3He concentrations up to 21%), in a Corbino conductivity measurement. The resonances are observed only on the mixture surfaces, and were not observed both on pure 4He and pure 3He. The resonance frequency is inversely proportional to the magnetic field applied perpendicular to the electron sheet. This property is quite similar to the characteristics of edge magnetoplasmons (EMPs) or inter-edge magnetoplasmons (IEMPs), although the resonance frequency is much smaller than the ordinary EMPs frequencies. The resonances are altered by tilting the electrodes. These results suggest that the inhomogeneity in the electron density on a macroscopic scale is induced by adding a small amount of 3He into liquid 4He (possibly due to the growth of 3He surface layers), and that the IEMPs propagate at the boundary between two regions with different electron densities.

Original languageEnglish
Pages (from-to)787-790
Number of pages4
JournalPhysica E: Low-Dimensional Systems and Nanostructures
Issue number1-3
Publication statusPublished - 2004 Apr
Event15th International Conference on ELectronic Propreties - Nara, Japan
Duration: 2003 Jul 142003 Jul 18


  • Edge magnetoplasmons
  • He-He liquid mixtures

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics


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