DOI: 10.1063/10.0020162 ISSN: 1063-777X

Anomalous temperature dependence of energy levels of electrons on helium

Kostyantyn Nasyedkin, Masamitsu Watanabe, Kimitoshi Kono
  • General Physics and Astronomy
  • Physics and Astronomy (miscellaneous)

We report on magnetoconductivity measurements of electrons on helium exposed to resonant microwave irradiation within the temperature range associated with electron-ripplon scattering. Our findings reveal a non-monotonic temperature dependence of the intersubband frequency, with an abrupt decrease observed at temperatures below 0.3 K. We attribute this unexpected energy levels shift to the adsorption of 3He impurities near the liquid helium surface at low temperatures and such behavior is consistent with recent theoretical calculations of the surface electron energy spectra on 3He–4He mixtures.

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