Evidence for high TC superconducting transitions in isolated Al45- and Al47- nanoclusters

被引：31

作者：

Cao, Baopeng ^{[2
]}

Neal, Colleen M. ^{[2
]}

Starace, Anne K. ^{[2
]}

Ovchinnikov, Yurii N. ^{[3
]}

Kresin, Vladimir Z. ^{[1
]}

Jarrold, Martin F. ^{[2
]}

机构：

[1] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA

[2] Indiana Univ, Dept Chem, Bloomington, IN 47405 USA

[3] LD Landau Theoret Phys Inst, Moscow 117334, Russia

来源：

JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM | 2008年 / 21卷 / 03期

基金：

美国国家科学基金会;

关键词：

nanoclusters; peaks in the heat capacity; pairing transition;

D O I：

10.1007/s10948-008-0314-3

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Heat capacities measured for Al-45(-) and Al-47(-) nanoclusters have reproducible jumps at similar to 200 K. These jumps are consistent with theoretical predictions that some clusters with highly degenerate electronic states near the Fermi level will undergo a transition into a high T-C superconducting state. An analysis based on a theoretical treatment of pairing in Al-45(-) and Al-47(-) agrees well with the experimental data in both the value of the critical temperature and in the size and width of the jumps in the heat capacity.

引用

页码：163 / 166

页数：4

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