Spectroscopic STM studies of single pentacene molecules on Cu(110)-c(6 x 2)O

被引：6

作者：

Gall, Johannes ^{[1
]}

Zeppenfeld, Peter ^{[1
]}

Sun, Lidong ^{[1
]}

Zhang, Li ^{[2
]}

Luo, Yang ^{[2
]}

Dong, Zhenchao ^{[2
]}

Hu, Chunguang ^{[3
]}

Puschnig, Peter ^{[4
]}

机构：

[1] Johannes Kepler Univ Linz, Inst Expt Phys, A-4040 Linz, Austria

[2] Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Peoples R China

[3] Tianjin Univ, State Key Lab Precis Measuring Technol & Instrume, Weijin Rd, Tianjin 300072, Peoples R China

[4] Karl Franzens Univ Graz, Inst Phys, NAWI Graz, A-8010 Graz, Austria

来源：

PHYSICAL REVIEW B | 2016年 / 94卷 / 19期

基金：

中国国家自然科学基金; 奥地利科学基金会;

关键词：

D O I：

10.1103/PhysRevB.94.195441

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Pentacene adsorbed on the Cu(110)-c(6 x 2)O surface has been investigated using scanning tunneling microscopy and spectroscopy and density functional theory calculations. The molecules lie almost flat on the surface and are anchored via the end carbon ring to a Cu atom of the topmost surface layer, leading to a break of the mirror symmetry of pentacene parallel to the short molecular axis. As a result the molecular electronic structure of the frontier orbitals exhibits a local and gentle modification around the anchoring site but is essentially unaffected in the remaining part of the molecule. The enhancement of the conductance peak related to the second highest occupied molecular orbital (HOMO-2) at the anchoring site, however, is suggestive of a resonance with a surface state or with the Cu d-band.

引用

页数：6

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