6 papers
Many-Body effects beyond excitons in second-harmonic generation of monolayer MoS
Peio Garcia-Goiricelaya, Julen Ibañez-Azpiroz
We present a quantitative study of many-body effects including the three-particle level on second-harmonic generation in monolayer MoS. Our approach combines many-body perturba…
Charge and spin photogalvanic effects in the p-wave magnet NiI2
Giuseppe Cuono, Srdjan Stavric, Javier Sivianes Castano +4
NiI2 is an exotic van der Waals material in which a noncollinear spin spiral breaks spatial inversion symmetry without sizeable structural distortion, generating improper ferroelec…
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…
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…
Giant non-reciprocal band structure effect in a multiferroic material
Srdjan StavriÄ, Giuseppe Cuono, Baishun Yang +5
Multiferroic materials, characterized by the coexistence of ferroelectricity and ferromagnetism, may unveil band structures suggestive of complex phenomena and new functionalities.…
Computing Floquet quasienergies in finite and extended systems: Role of electromagnetic and quantum-geometric gauges
Ãlvaro R. Puente-Uriona, Michele Modugno, Ivo Souza +1
We present an approach to compute the Floquet quasienergy spectrum of time-periodic systems. The method allows to characterize the light-matter interaction in finite and extended s…