LITHIUM-INDUCED RECONSTRUCTIONS OF THE SI(001) SURFACE
SCIE
SCOPUS
- Title
- LITHIUM-INDUCED RECONSTRUCTIONS OF THE SI(001) SURFACE
- Authors
- KIM, CY; SHIN, KS; LEE, KD; CHUNG, JW
- Date Issued
- 1995-02-01
- Publisher
- ELSEVIER SCIENCE BV
- Abstract
- We report the new LEED observation that lithium atom adsorption on a Si(001) surface at room temperature or below produces a series of ordered phases, (2 x 2):Li --> (2 x 1):Li --> c(3 root 2 x root 2)R45 degrees:Li --> streaky c(3 root 2 x root 2)R45 degrees:Li --> (4 x 1):Li --> (1 x 1):Li, depending on adsorbate coverage. This observation partially contradicts previous studies which reported only two phases in the series. We discuss possible origins of the controversy. We then propose a structural model that may account for the sequential appearance of the phases most naturally by invoking a spin-flip mechanism of an impurity stabilized magnetic system. The results suggest that the first phase be a reconstruction of the silicon substrate induced by Li adsorption where asymmetric dimers arrange themselves ferromagnetically and antiferromagnetically along the [110] and [110] directions, respectively.
- Keywords
- ALKALI METALS; LOW ENERGY ELECTRON DIFFRACTION (LEED); SILICON; SURFACE RELAXATION AND RECONSTRUCTION; WORK FUNCTION MEASUREMENTS; SCANNING TUNNELING MICROSCOPY; ANGLE-RESOLVED-PHOTOEMISSION; ALKALI-METAL ADSORPTION; ELECTRONIC-STRUCTURE; PHOTOELECTRON-SPECTROSCOPY; SEMICONDUCTOR SURFACES; SI(100)2X1 SURFACE; TOTAL-ENERGY; STATES; MODEL
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/21850
- DOI
- 10.1016/0039-6028(94)00721-7
- ISSN
- 0039-6028
- Article Type
- Article
- Citation
- SURFACE SCIENCE, vol. 324, no. 1, page. 8 - 16, 1995-02-01
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