Speaker
Description
Altermagnets combine collinear antiferromagnetic order with momentum-space spin splitting and anisotropic responses, offering a platform for unconventional spin and charge transport without net magnetization. We investigate nonequilibrium properties of two-dimensional altermagnetic models driven by an applied bias that sustains a steady current. Our approach is based on dynamical mean-field theory (DMFT) with the auxiliary master equation approach (AMEA) as impurity solver, enabling access to steady-state Green’s functions and spectral properties beyond linear response. The lattice model incorporates antiferromagnetic order together with anisotropic next-nearest-neighbor hopping to capture the symmetry ingredients characteristic of altermagnetism. We focus on bias-dependent spectral features, spin-resolved currents, and the interplay between anisotropy and correlation effects in determining transport coefficients. The framework allows us to assess potential nonreciprocal or direction-dependent responses tied to the underlying crystalline symmetries. We will present the computational setup and discuss representative results and trends, emphasizing how nonequilibrium driving modifies the altermagnetic state and its transport signatures.