EXPERIMENTAL-STUDY ON COUPLED PLASMON-RIPPLON RESONANCES AND THE DEBYE-WALLER FACTOR OF THE WIGNER CRYSTAL

K KONO*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

A new experimental method has been developed for studying coupled plasmon-ripplon resonances of electron crystal formed on the surface of liquid helium. Measurements are done at temperatures between 0.45 and 0.9 K and electron areal densities from 5 ×10 8 to 1.2 ×10 9 cm -2 . Resonance frequencies are quantitatively compared with the theory by Fisher, Halperin, and Platzman (FHP) and by Namaizawa. The agreement between the experiment and the FHP theory is satisfactory at low electron densities, although at high densities a modification is needed. The Debye-Waller facfor of the Wigner crystal is well explained by the Debye model, and the factor is found to have a significant contribution from the zero-point vibration of the Wigner crystal.
Original languageEnglish
Pages (from-to)1111-1122
Number of pages12
JournalJournal of the Physical Society of Japan
Volume56
Issue number3
DOIs
StatePublished - Mar 1987

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