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Effects of 3He impurities on the superfluid response of the 4He monolayer on a C20 molecule
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10.1063/1.4792204
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Affiliations:
1 Division of Quantum Phases and Devices, School of Physics, Konkuk University, Seoul 143-701, South Korea
a) Electronic mail: ykwon@konkuk.ac.kr.
J. Chem. Phys. 138, 064307 (2013)
/content/aip/journal/jcp/138/6/10.1063/1.4792204
http://aip.metastore.ingenta.com/content/aip/journal/jcp/138/6/10.1063/1.4792204
View: Figures

## Figures

FIG. 1.

Radial density distributions of the total 32 helium atoms adsorbed on C20 at T = 0.31 K. The black solid line represents the density distribution of the pure 4He layer and the red solid line corresponds to the total density distribution of the mixed layer with 28 4He atoms and 4 3He atoms. The red dotted line and the red dashed one represent the 4He density distribution and the 3He distribution of the mixed layer, respectively. R is the distance from the C20 molecular center.

FIG. 2.

Angular pair correlation functions of total 32 helium atoms on C20 at T = 0.31 K. Here the number of 3He atoms varies while the total number of 3He and 4He atoms is fixed to 32. γ represents the angle between the position vectors of two helium atoms on the C20 molecular surface.

FIG. 3.

Contour plots of angular density distributions of the 3He–4He mixed layer on C20 for (a) N tot = 14, (b) N tot = 24, (c) N tot = 30, and (d) N tot = 32, where the number of 3He atoms is fixed to 4. The horizontal axis corresponds to the azimuthal angle ϕ and the vertical one to the cosine of the polar angle θ. The characters C and P’s represent the angular positions of the carbon atoms and those of the pentagon centers, respectively. All contour plots are in the same color scale denoted by the color table in the upper right hand corner.

FIG. 4.

Contour plots of the 3He angular distributions of the mixed layer with (a) N tot = 24 and (b) N tot = 30, where the number of 3He atoms is fixed to 4. The horizontal axis corresponds to the azimuthal angle ϕ and the vertical one to the cosine of the polar angle θ. The characters C and P’s represent the angular positions of the carbon atoms and those of the pentagon centers, respectively. Different color scales of two contour plots are represented by the color tables on their right hand sides.

FIG. 5.

4He superfluid fractions of the mixed helium layer on a C20 molecule as a function of the system size, , at T = 0.31 K. The PIMC results for the pure 4He monolayer are from Ref. .

/content/aip/journal/jcp/138/6/10.1063/1.4792204
2013-02-14
2014-04-23

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