Journal of the Korean Vacuum Society (한국진공학회지)
- Volume 1 Issue 1
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- Pages.88-95
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- 1992
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- 1225-8822(pISSN)
Exponent Study of the p($2{\times}1$ ) Phase on an O/W(110) Surface
O/W(110) 표면의 p($2{\times}1$ ) 구조의 임계지수 연구
Abstract
Abstract-Using a high resolution low energy electron diffraction(HRLEED), we report an exponent study of 2d continuous phase transition from an ordered ~ ( 2 x 1 )ox ygen overlayer on a W(110) surface. Temperature dependence of a (% 0) superlattice diffraction spot, characteristic of the p(2X 1) structure, shows power-law like divergence of the susceptibility and the fluctuation correlation length at T,=708.765 K. By fitting the intensities as well as the line-shapes, we obtained exponents P=0.19* 0.05, y=1.48+ 0.34, v= 1.23i 0.27 and q=0.38+ 0.12. The non-universal character of the exponents are understood in terms of a 2d XY model with cubic anisotropy as suggested previously.
고분해능 저에너지 전자회절법(HRLEED)을 이용하여 O/W(110) 표면의 산소흡착층 의 정돈된 p(2
Keywords