Adsorbate-induced pinning of a charge-density wave in a quasi-1D metallic chains: Na on the In/Si(111)-(4 x 1) surface
SCIE
SCOPUS
- Title
- Adsorbate-induced pinning of a charge-density wave in a quasi-1D metallic chains: Na on the In/Si(111)-(4 x 1) surface
- Authors
- Lee, SS; Ahn, JR; Kim, ND; Min, JH; Hwang, CG; Chung, JW; Yeom, HW; Ryjkov, SV; Hasegawa, S
- Date Issued
- 2002-05-13
- Publisher
- AMERICAN PHYSICAL SOC
- Abstract
- We find that foreign adsorbates acting as local impurities can induce a metal-insulator transition by pinning a charge-density wave (CDW) on the quasi-1D metallic In/Si(111)- (4x1) chain system. Our scanning tunneling microscopy image clearly reveals the presence of a new local 4x2 structure nucleated by Na adatoms at room temperature, which turns out to be insulating with a doubled periodicity along the chains. We directly determine a CDW gap energy Delta=105+/-8 meV by identifying a characteristic loss peak in our high-resolution electron-energy-loss spectra. We thus report the first observation of a local impurity-derived Peierls-like reconstruction of a quasi-1D system.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/12418
- DOI
- 10.1103/PhysRevLett.88.196401
- ISSN
- 0031-9007
- Article Type
- Article
- Citation
- PHYSICAL REVIEW LETTERS, vol. 88, no. 19, 2002-05-13
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