C 1s photoemission spectrum in graphite(0001)

被引：19

作者：

Lizzit, S. ^{[1
]}

Petaccia, L. ^{[1
]}

Goldoni, A. ^{[1
]}

Larciprete, R. ^{[1
,2
]}

Hofmann, Ph. ^{[3
,4
]}

Zampieri, G. ^{[5
,6
]}

机构：

[1] Sincrotrone Trieste SCpA, I-34012 Trieste, Italy

[2] CNR, Inst Complex Syst, I-00133 Rome, Italy

[3] Univ Aarhus, Inst Storage Ring Facil, DK-8000 Aarhus C, Denmark

[4] Univ Aarhus, Interdisciplinary Nanosci Ctr iNANO, DK-8000 Aarhus C, Denmark

[5] Comis Nacl Energia Atom, Ctr Atom Bariloche, RA-8400 San Carlos De Bariloche, Rio Negro, Argentina

[6] Comis Nacl Energia Atom, Inst Balseiro, RA-8400 San Carlos De Bariloche, Rio Negro, Argentina

来源：

PHYSICAL REVIEW B | 2007年 / 76卷 / 15期

关键词：

D O I：

10.1103/PhysRevB.76.153408

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The combination of the two-dimensional layered structure and the semimetallic character of graphite is expected to produce a C 1s photoemission spectrum of the (0001) surface with only one highly symmetric component. This simple view has been challenged by a recent study, performed on highly oriented pyrolytic graphite (HOPG), in which the existence of two components separated by 120 meV has been reported [T. Balasubramanian et al., Phys. Rev. B 64, 205420 (2001)]. Since HOPG is not perfectly crystalline, in this study, we present a comparison of high-resolution C 1s spectra measured in HOPG, natural graphite crystals, and crystalline graphite films grown on 6H-SiC(0001). Our results demonstrate clearly that the spectrum in graphite (0001) has just one component; the second component at 120 meV is observed only in HOPG and must, therefore, be associated with defects present in this not perfectly crystalline material.

引用

页数：4

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