Ferromagnetically ordered metal in the single-band Hubbard model

We study a ferromagnetic instability in a single-band Hubbard model on the hypercubic lattice away from half tilling. Using dynamical mean-field theory with the continuous-time quantum Monte Carlo simulations based on the segment algorithm. we calculate the magnetic susceptibility in the weak and strong coupling regions systematically. We then find how ferromagnetic fluctuations are enhanced when the interaction strength and density of holes are varied. The efficiency of the double flip updates in the Monte Carlo simulations is also addressed.

Automated summary

This study investigates a ferromagnetic instability in a single-band Hubbard model on the hypercubic lattice away from half filling. By utilizing dynamical mean-field theory and continuous-time quantum Monte Carlo simulations, it systematically calculates the magnetic susceptibility in both weak and strong coupling regions. The research also explores how ferromagnetic fluctuations are amplified under varying interaction strengths and hole densities, while addressing the efficiency of double flip updates in Monte Carlo simulations.