Quantum Monte-Carlo simulation of FeAs-based superconductors

2nd International Conference on Mathematical Modeling in Physical Sciences 2013

物理学;数学

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

National Research Nuclear University MEPhI, Kashirskoye shosse 31, Moscow, Russia^1

关键词: Correlation function;    Fe-As based superconductors;    Finite temperatures;    Occupation numbers;    Quantum monte carlo;    Quantum Monte Carlo simulations;    Thermodynamic characteristics;    Two-orbital models;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/490/1/012222/pdf
DOI  :  10.1088/1742-6596/490/1/012222

来源: IOP

【 摘 要 】

The generalized quantum Monte Carlo algorithm is developed and used to calculate the energy, occupation numbers, and correlation functions of finite FeAs clusters in the two-orbital model at finite temperatures. The coding of quantum states made it possible to take into account complex exchange terms between the orbitals. The results for the calculation of the thermodynamic characteristics of finite two-dimensional FeAs clusters simulating iron-based superconductors have been obtained.