C-60 - INTERACTING ELECTRONS ON A SPHERICAL MOLECULE

被引：28

作者：

MURTHY, GN ^{[1
]}

AUERBACH, A ^{[1
]}

机构：

[1] TECHNION ISRAEL INST TECHNOL,DEPT PHYS,IL-32000 HAIFA,ISRAEL

来源：

PHYSICAL REVIEW B | 1992年 / 46卷 / 01期

关键词：

D O I：

10.1103/PhysRevB.46.331

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We study a simplified model of C60, where the pi-electrons move freely on the surface of a sphere. The total energy in the presence of an adjustable repulsive interaction is computed by first- and second-order perturbation theory. The second-order results yield an effective attraction (pair binding) between electrons which are added above a closed angular-momentum shell. For different regimes of interaction parameters, we find an L=0 singlet and an L=1 triplet ground state. Pair binding occurs at larger couplings for longer-range interactions. We estimate the third-order corrections, and define the region where the second-order predictions are expected to hold. The relevance of this model to superconductivity and ferromagnetism in doped fullerenes is discussed.

引用

页码：331 / 341

页数：11

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