Pinning of quantized vortices in helium drop by dopant atoms and molecules

Details Pinning of quantized vortices in helium drop by dopant atoms and molecules Pinning of quantized vortices in helium drop by dopant atoms and molecules

2000-01-20

arxiv.org/abs/cond-mat/0001288v1

Phys. Rev. Lett 85, 1028(2000)

Physics

Condensed Matter

Typeset using Revtex, 3 pages and 5 figures (4 Postscript, 1 jpeg)

Scientific paper

10.1103/PhysRevLett.85.1028

Using a density functional method, we investigate the properties of liquid 4He droplets doped with atoms (Ne and Xe) and molecules (SF_6 and HCN). We consider the case of droplets having a quantized vortex pinned to the dopant. A liquid drop formula is proposed that accurately describes the total energy of the complex and allows one to extrapolate the density functional results to large N. For a given impurity, we find that the formation of a dopant+vortex+4He_N complex is energetically favored below a critical size N_cr. Our result support the possibility to observe quantized vortices in helium droplets by means of spectroscopic techniques.

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