• 文献标题:   Electronic structure of epitaxial graphene grown on stepped Pt(997)
  • 文献类型:   Article
  • 作  者:   PISARRA M, PACILE D, MORAS P, SHEVERDYAEVA PM, SINDONA A, PAPAGNO M, CARBONE C
  • 作者关键词:  
  • 出版物名称:   PHYSICAL REVIEW B
  • ISSN:   1098-0121 EI 1550-235X
  • 通讯作者地址:   Univ Calabria
  • 被引频次:   9
  • DOI:   10.1103/PhysRevB.89.195438
  • 出版年:   2014

▎ 摘  要

Angle-resolved photoemission spectroscopy, low-energy electron diffraction, and density functional theory calculations were employed to investigate the electronic and structural properties of a graphene layer grown on the regularly stepped Pt(997) surface. The measurements show the predominance of a (2 x 2) multidomain superstructure of graphene, lying flat on the Pt terraces and covering the step edges in a carpetlike mode. The linearly dispersing p band of graphene appears to be weakly affected by the substrate at the K point, while an appreciable hybridization is found at the Gamma point. Replicas of the Dirac cone are seen perpendicularly to the steps, with double real-space periodicity compared to the Pt terrace width.