Effect of the direct correlation function on phase diagram of the two-mode phase field crystal model | Zendy

Can Guo | Zendy; Wang Zhi-jun | Zendy; Jincheng Wang | Zendy; Yaolin Guo | Zendy; Sai Tang | Zendy

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Effect of the direct correlation function on phase diagram of the two-mode phase field crystal model

Author(s) -

Can Guo,

Wang Zhi-jun,

Jincheng Wang,

Yaolin Guo,

Sai Tang

Publication year - 2013

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.62.108104

Subject(s) - phase diagram , phase (matter) , correlation function (quantum field theory) , mode (computer interface) , function (biology) , crystal (programming language) , diagram , condensed matter physics , materials science , field (mathematics) , correlation , gaussian , physics , mathematics , statistics , geometry , quantum mechanics , evolutionary biology , computer science , dielectric , pure mathematics , biology , programming language , operating system

Effects of the width of direct correlation function peak and the peak at k=0 on the phase diagram for the two-mode phase field crystal model are examined carefully. The results indicate that increasing the width of direct correlation function peak will expand the stability region of the ordered phases; however, increasing the ratio of peak width will significantly increase the fcc phase region but reduce the bcc phase region. Adding a negative Gaussian peak at k=0 to the two-mode approximate direct correlation function will compress the phase diagram and make the two-phase coexisting region narrow.

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