In-plane asymmetries on the Ge(111)-c(2×8) surface mapped with the scanning tunneling microscope

P. Molinas-Mata, J. Zegenhagen, M. Bohringer, N. Takeuchi, A. Selloni

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Scopus citations

Abstract

We report on new experimental studies of the Ge(111)-c(2×8) reconstruction performed with low-energy electron diffraction (LEED) and scanning tunneling microscopy (STM). Weak quarter-order reflections are present in the c(2×8) LEED pattern in agreement with previous observations and results of ab initio calculations. In order to gain insight into the predicted splitting of dangling bond states, we compare constant current topographs (CCT's) performed at high-tunneling currents (40.nA) with first-principles calculations of the local density of states (LDOS) 1angstrom above the surface adatoms and obtain good qualitative agreement. We finally discuss to what extent the STM CCT's at high tunneling currents (small sample-tip distances (STD)) are sensitive to surface states outside the Γ̄ point.

Original languageEnglish (US)
Title of host publicationMaterials Research Society Symposium Proceedings
PublisherPubl by Materials Research Society
Pages207-212
Number of pages6
ISBN (Print)1558991905
StatePublished - Jan 1 1993
Externally publishedYes
EventSymposium on Atomic-scale Imaging of Surfaces and Interfaces -
Duration: Nov 30 1992Dec 2 1992

Publication series

NameMaterials Research Society Symposium Proceedings
Volume295
ISSN (Print)0272-9172

Other

OtherSymposium on Atomic-scale Imaging of Surfaces and Interfaces
Period11/30/9212/2/92

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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  • Cite this

    Molinas-Mata, P., Zegenhagen, J., Bohringer, M., Takeuchi, N., & Selloni, A. (1993). In-plane asymmetries on the Ge(111)-c(2×8) surface mapped with the scanning tunneling microscope. In Materials Research Society Symposium Proceedings (pp. 207-212). (Materials Research Society Symposium Proceedings; Vol. 295). Publ by Materials Research Society.