Doping of C60 (sub)monolayers by Fermi-level pinning induced electron transfer

被引：42

作者：

Niederhausen, J. ^{[1
]}

Amsalem, P. ^{[1
]}

Wilke, A. ^{[1
]}

Schlesinger, R. ^{[1
]}

Winkler, S. ^{[1
,2
]}

Vollmer, A. ^{[2
]}

Rabe, J. P. ^{[1
]}

Koch, N. ^{[1
,2
]}

机构：

[1] Humboldt Univ, Inst Phys, D-12489 Berlin, Germany

[2] Helmholtz Zentrum Berlin Mat & Energie GmbH, BESSY II, D-12489 Berlin, Germany

来源：

PHYSICAL REVIEW B | 2012年 / 86卷 / 08期

关键词：

MOLECULAR CHAINS; CHARGE-TRANSFER; ORGANIC FILMS; INTERFACES; ALIGNMENT; METAL; SEXITHIOPHENE; SUPERCONDUCTIVITY; STATES;

D O I：

10.1103/PhysRevB.86.081411

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Fermi-level pinning of C-60 (sub)-monolayers on a sexithiophene (6T) bilayer grown on Ag(111) is shown to induce electron transfer from the metal to a fraction of the C-60 molecules. The electrostatic potential resulting from the charge transfer process is responsible for a potential drop within the 6T interlayer and, more remarkably, for dipole-dipole repulsion, leading to a disproportionation into coexisting neutral and charged C-60 molecules. We suggest that charge ordering phenomena may occur for such systems.

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页数：5

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