Open AccessRENORMALIZATION GROUP STUDY OF ORDER-DISORDER TRANSITIONS IN THE W(112)p(2×l)-O SYSTEM
Author(s) -
赵立华,
冯克安,
伍乃娟
Publication year - 1986
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.35.104
Subject(s) - renormalization group , overlayer , physics , phase diagram , fixed point , order (exchange) , infrared fixed point , critical exponent , renormalization , mathematical physics , coupling (piping) , recursion (computer science) , coupling constant , condensed matter physics , phase transition , quantum mechanics , phase (matter) , mathematics , materials science , mathematical analysis , finance , economics , algorithm , metallurgy
The position-space renormalization group method is employed to investigate the order-disorder transitions in the W(112)p(2×1)-O system. The recursion relations are based on the periodically continued cluster of four cells with four sites each. We consider the pairwise interactions between nearest, nextnearest neighbours as well as the three-particle and four-particle interactions and formulate the relationships between renormalized coupling parameters K′a and interaction constants Ka. From the renormalization iteration, we find the fixed point Ka* and the critical temperature Tc for various monolayer coverages. The phase diagram of the W(112)p(2×l)-O overlayer obtained is found to be in agreement with the existing experimental results.