3 papers
cond-mat.mes-hall2026
Linear response of the Chern insulator MnBiTe: A Wannier function approach
Matthew Albert, Javier Sivianes, Jason G. Kattan +2
Recent work demonstrated that in the long wavelength limit the linear response of a Chern insulator to finite-frequency electric fields is the sum of two terms: A general frequency…
cond-mat.mes-hall2025
Surface-state engineering for nonlinear charge and spin photocurrent generation
Javier Sivianes, Peio Garcia-Goiricelaya, Daniel Hernangómez-Pérez +1
We systematically explore a pathway for generating nonlinear charge and spin photocurrents using spin-orbit-split surface states. This mechanism enables net charge and spin flow al…
cond-mat.mes-hall2025
Optical signatures of spin symmetries in unconventional magnets
Javier Sivianes, Flaviano José dos Santos, Julen Ibañez-Azpiroz
The concept of spin symmetries has gained renewed interest as a valuable tool for classifying unconventional magnetic phases, including altermagnets and recently identified p-wave…