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First-principles study of bulk stacking, picture, magnetic Hamiltonian, factors, and structural distortions of -RuCl
Seung-Ju Hong, Tae Yun Kim, Cheol-Hwan Park
-RuCl is a candidate Kitaev material that exhibits zigzag antiferromagnetic ordering below 7 K. One contentious issue regarding this material is its bulk structure in the lo…
Lippmann-Schwinger Approach for Accurate Photoelectron Wavefunctions and Angle-Resolved Photoemission Spectra from First Principles
Ji Hoon Ryoo, Cheol-Hwan Park
We present a conceptually simple and technically straightforward method for calculating photoelectron wavefunctions that is easily integrable with standard wavefunction-based densi…
Theory of infrared magneto-optical effects from chiral phonons in solids
Chiara Fiorazzo, Cheol-Hwan Park, Ivo Souza +1
In crystals with broken time-reversal symmetry, zone-center phonons can acquire a finite angular momentum via velocity-dependent forces on the nuclei. Despite having the same order…
Non-adiabatic phonon self-energy due to electrons with finite linewidths
Cheol-Hwan Park
We develop the theory of the non-adiabatic phonon self-energy arising from coupling to electrons with finite linewidths using the spectral representation of Green's functions. Our…