Superconductivity in Ca-intercalated bilayer graphene

被引：32

作者：

Mazin, I. I. ^{[2
]}

Balatsky, A. V. ^{[1
,3
]}

机构：

[1] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA

[2] USN, Res Lab, Washington, DC 20375 USA

[3] Los Alamos Natl Lab, Ctr Integrated Nanotechnol, Los Alamos, NM 87545 USA

来源：

PHILOSOPHICAL MAGAZINE LETTERS | 2010年 / 90卷 / 10期

关键词：

carbon thin films; carbon-based materials; superconductivity;

D O I：

10.1080/09500839.2010.487473

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Recent observation of proximity effect [H. B. Heersche, P. Jarillo-Herrero, J.B. Oostinga, L. M. K. Vandersypen, and A. F. Morpurgo, Nature, bf 446 (2007) p. 05555.] has ignited interest in superconductivity in graphene and its derivatives. We consider Ca-intercalated graphene bilayer and argue that it is a superconductor, and likely with a sizeable T-c. We find substantial and suggestive similarities between Ca-intercalated bilayer (C6CaC6), and CaC6, an established superconductor with T-c = 11.5 K. In particular, the nearly free electron band, proven to be instrumental for superconductivity in intercalated graphites, does cross the chemical potential in (C6CaC6), despite the twice smaller doping level, satisfying the so-called "Cambridge criterion". Calculated properties of zone-center phonons are very similar to those of CaC6. This suggests that the critical temperature would probably be on the same scale as in CaC6.

引用

页码：731 / 738

页数：8

共 21 条

[1] SUPERCONDUCTIVITY OF GIC WITH LI, NA AND K [J].