Hyowon Park

Nov 21, 2023 | link.aps.org | Alex Lee |Hyowon Park |Anh Ngo

We study the effect of the off-diagonal elements of the Wannier Hamiltonian on the electronic structure of the low-symmetry material Li2MnO3 (C2/m), using dynamical mean field theory calculations with a continuous-time quantum Monte Carlo impurity solver. The presence of significant off-diagonal elements leads to a pronounced suppression of the energy gap.

Apr 27, 2023 | link.aps.org | Xingyu Liao |Michael Norman |Hyowon Park

Abstract Infinite-layer nickelates (RNiO2) exhibit some distinct differences as compared to cuprate superconductors, leading to a debate concerning the role of rare-earth ions (R=La,Pr,Nd) in the low-energy many-body physics. Although rare-earth 4f orbitals are typically treated as inert “core” electrons in studies, this approximation has been questioned.