Ginzburg-Landau functional for three order parameter problem

3rd International Workshop on Theoretical and Computational Physics: Complex Systems and Interdisciplinary Physics;40th National Conference on Theoretical Physics

物理学;计算机科学

Van Hinh, Nguyen^1,2 ; Lan, Nguyen Tri^2

Faculty of Fundamental Science, Ha Noi University of Industry, Minh Khai, Bac Tu Liem, Hanoi, Viet Nam^1

Institute of Physics Vietnamese Academy of Science and Technology, 10 Dao Tan, Ba Dinh, Hanoi, Viet Nam^2

关键词: Auxiliary-fields;    Experimental evidence;    Functional integral formalism;    Ginzburg-Landau functional;    Multicomponents;    Perturbative expansion;    Quantum field theory;    Theoretical research;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/726/1/012016/pdf
DOI  :  10.1088/1742-6596/726/1/012016

学科分类：计算机科学（综合）

来源: IOP

【 摘 要 】

A model is presented utilizing a generic Hamiltonian with equal pairings in channels based on quantum field theory and functional integral formalism, to show the correlation among the order parameters which are described in multi-component Ginzburg-Landau functional. In the vicinity of the phase transition, the further perturbative expansions of the functional around the mean-field theory in the auxiliary fields are carried out with the aim of leading to a possible solution for the coexistence of many phases. The work is motivated by the recent theoretical researches and experimental evidences of the coexistence of superconductivity and ferromagnetism in U and Ce compounds.