COLLECTIVE EXCITATIONS OF HELIUM CLUSTERS

被引：109

作者：

KRISHNA, MVR

WHALEY, KB

机构：

[1] Department of Chemistry, University of California, Berkeley

来源：

PHYSICAL REVIEW LETTERS | 1990年 / 64卷 / 10期

关键词：

D O I：

10.1103/PhysRevLett.64.1126

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The excitation spectra of compressional modes of HeN4, N=20, 70, and 240, clusters at 0 K are calculated by treating the cluster as a quantum liquid drop. The spectrum of N=240 strongly resembles that of liquid helium with a visible roton structure, while for N=20 no roton minimum is seen and N=70 shows a weak minimum. Implications of these findings for superfluidity in helium clusters are discussed. © 1990 The American Physical Society.

引用

页码：1126 / 1129

页数：4

共 18 条

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