Pair correlation functions of FeAs-based superconductors: Quantum Monte Carlo study

3rd International Conference on Mathematical Modeling in Physical Sciences

物理学;数学

Kashurnikov, V.A.^1 ; Krasavin, A.V.^1

National Research Nuclear University MEPhI (Moscow Engineering Physics Institute), 31 Kashirskoye shosse, Moscow

115409, Russia^1

关键词: Effective charge;    Fe-As based superconductors;    Monte carlo algorithms;    Order parameter;    Pair correlation functions;    Pair correlations;    Quantum monte carlo studies;    Two-orbital models;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/574/1/012090/pdf
DOI  :  10.1088/1742-6596/574/1/012090

来源: IOP

【 摘 要 】

The new generalized quantum continuous time world line Monte Carlo algorithm was developed to calculate pair correlation functions for two-dimensional FeAs-clusters modeling of iron-based superconductors within the framework of the two-orbital model. The analysis of pair correlations depending on the cluster size, temperature, interaction, and the type of symmetry of the order parameter is carried out. The data obtained for clusters with sizes up to 1 0x1 0 FeAs-cells favor the possibility of an effective charge carrier's attraction that is corresponding the A1g-symmetry, at some parameters of interaction.