Pinning of quantized vortices in helium drops by dopant atoms and molecules
Pinning of quantized vortices in helium drops by dopant atoms and molecules
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掺杂原子和分子对氦滴中量子化涡旋的钉扎
DOI：
10.1103/physrevlett.85.1028
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发表时间：
2000
影响因子：
8.6
通讯作者：
Barranco
中科院分区：
文献类型：
--
作者：
Dalfovo;Mayol;Pi;Barranco
利用密度泛函方法，研究了掺杂原子（Ne和Xe）和分子（SF6和氰化氢）的液态4He液滴的性质。我们考虑有一个量子化涡流固定在掺杂剂上的液滴的情况。本文提出了一个精确描述配合物总能量的液滴公式，并允许将密度泛函结果外推到大N。对于给定的杂质，我们发现在临界尺寸N（cr）以下，有利于形成掺杂物+漩涡+(4)He(N)配合物。我们的结果支持了用光谱技术观察氦液滴中量子化漩涡的可能性。
Using a density functional method, we investigate the properties of liquid 4He droplets doped with atoms (Ne and Xe) and molecules ( SF6 and hydrogen cyanide). 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+(4)He(N) complex is energetically favored below a critical size N(cr). Our results support the possibility to observe quantized vortices in helium droplets by means of spectroscopic techniques.