RENORMALIZATION GROUP STUDY OF ORDER-DISORDER TRANSITIONS IN THE W(112)p(2×l)-O SYSTEM | Zendy

Zhao Lihua | Zendy; FENG KE-AN | Zendy; Wu Naijuan | Zendy

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RENORMALIZATION GROUP STUDY OF ORDER-DISORDER TRANSITIONS IN THE W(112)p(2×l)-O SYSTEM

Author(s) -

Zhao Lihua,

FENG KE-AN,

Wu Naijuan

Publication year - 1986

Publication title -

acta physica sinica

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.

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