TY - JOUR
T1 - Conductivity measurement of helium surface electrons in the coexistence of adsorbed 2D atomic hydrogen gas
AU - Arai, T.
AU - Yamanaka, S.
AU - Yayama, H.
AU - Fukuda, A.
AU - Sawada, A.
PY - 2009
Y1 - 2009
N2 - Cold hydrogen atoms (H) are adsorbed on liquid helium surface to form two-dimensional (2D) quantum gas. Because of the boson nature of H atoms, when 2D H gas is cold and dense enough, it is expected to exhibit a transition to superfluid phase by Kosterlitz-Thouless mechanism. In order to sense the state of 2D H gas, we used helium surface electrons as a probe. Since the conductivity of surface electrons is sensitively influenced by collisions with its environment, such as He vapor atoms and ripplons, it is expected to detect the existence of H atoms on the same surface. We prepared a 2D mixture gas of H and electrons on a helium surface and measured the conductivity of the electrons. Strong magnetic field was applied to avoid chemical processes: electron attachment on H atom and H-H recombination. We employed pulse excited edge-magnetoplasmon (EMP) technique for the conductivity measurement. We show EMP spectrum under the influence of H atoms and discuss the potentiality of surface electrons for probing states of adsorbed 2D H gas.
AB - Cold hydrogen atoms (H) are adsorbed on liquid helium surface to form two-dimensional (2D) quantum gas. Because of the boson nature of H atoms, when 2D H gas is cold and dense enough, it is expected to exhibit a transition to superfluid phase by Kosterlitz-Thouless mechanism. In order to sense the state of 2D H gas, we used helium surface electrons as a probe. Since the conductivity of surface electrons is sensitively influenced by collisions with its environment, such as He vapor atoms and ripplons, it is expected to detect the existence of H atoms on the same surface. We prepared a 2D mixture gas of H and electrons on a helium surface and measured the conductivity of the electrons. Strong magnetic field was applied to avoid chemical processes: electron attachment on H atom and H-H recombination. We employed pulse excited edge-magnetoplasmon (EMP) technique for the conductivity measurement. We show EMP spectrum under the influence of H atoms and discuss the potentiality of surface electrons for probing states of adsorbed 2D H gas.
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U2 - 10.1088/1742-6596/150/3/032129
DO - 10.1088/1742-6596/150/3/032129
M3 - Article
AN - SCOPUS:77952539705
VL - 150
JO - Journal of Physics: Conference Series
JF - Journal of Physics: Conference Series
SN - 1742-6588
IS - 3
M1 - 032129
ER -