Mott transition and superconductivity in alkali-doped fullerides

被引：0
|
作者：
Gunnarsson, O [1 ]
Koch, E [1 ]
Martin, RM [1 ]
机构：
[1] Max Planck Inst Festkorperforsch, D-70506 Stuttgart, Germany
来源：
ELECTRONIC PROPERTIES OF NOVEL MATERIALS - PROGRESS IN MOLECULAR NANOSTRUCTURES: XII INTERNATIONAL WINTERSCHOOL | 1998年 / 442卷
关键词：
D O I：
暂无
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
We study the effects of deviations from cubic symmetry on superconductivity and on Mott transitions by comparing A(3)C(60) and NH3K3C60. The reduced frustration in NH3K3C60 favours a Mott transition at a lower ratio U/W, where U is the Coulomb repulsion of two electrons on the same molecule and W is the width of the t(1u) band. The closeness of NH3K3C60 to a Mott transition may influence the superconductivity negatively, due to an inefficient screening of the Coulomb repulsion.
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页码：287 / 291
页数：5
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