Nonmetal-metal transition in Ni clusters

被引:18
作者
AguileraGranja, F [1 ]
Bouarab, S [1 ]
Vega, A [1 ]
Alonso, JA [1 ]
MontejanoCarrizales, JM [1 ]
机构
[1] UNIV AUTONOMA SAN LUIS POTOSI,INST FIS,SAN LUIS POTOSI 78000,SLP,MEXICO
关键词
metals; nanostructures;
D O I
10.1016/S0038-1098(97)00380-3
中图分类号
O469 [凝聚态物理学];
学科分类号
070205 ;
摘要
We have studied the nonmetal-metal transition in Ni clusters. A self-consistent tight-binding method for the s, p and d valence electrons has been used to calculate the density of states and the prescription employed to identify the nonmetal-metal transition was Kubo's criterion that the density of states at the Fermi level should exceed 1/k(B)T. The calculated critical cluster size decreases fast with increasing temperature T and at the liquid nitrogen temperature clusters of about 50 atoms already present metallic behavior. (C) 1997 Elsevier Science Ltd.
引用
收藏
页码:635 / 639
页数:5
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