TY - JOUR
T1 - Edge magnetoplasma-like resonance in two-dimensional electrons on the surface of 3He-4He liquid mixtures
AU - Isshiki, Hanako
AU - Shibayama, Yoshiyuki
AU - Shirahama, Keiya
PY - 2004/4/1
Y1 - 2004/4/1
N2 - 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.
AB - 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.
KW - Edge magnetoplasmons
KW - He-He liquid mixtures
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U2 - 10.1016/j.physe.2003.12.124
DO - 10.1016/j.physe.2003.12.124
M3 - Conference article
AN - SCOPUS:1842783329
VL - 22
SP - 787
EP - 790
JO - Physica E: Low-Dimensional Systems and Nanostructures
JF - Physica E: Low-Dimensional Systems and Nanostructures
SN - 1386-9477
IS - 1-3
T2 - 15th International Conference on ELectronic Propreties
Y2 - 14 July 2003 through 18 July 2003
ER -