9 papers
Pressure induced redistribution of oxygen hole states in LaNiO
Guiwen Jiang, Liang Si, George A. Sawatzky +1
Using density functional calculations and multi-orbital, multi-atom cluster exact diagonalization that includes local exchange and Coulomb interactions, we explored the local low-e…
Disentangling the contributions of individual cations to magnetic order in a spinel high entropy oxide
Mario Ulises González-Rivas, Chun-Fu Chang, Martin Bluschke +8
High entropy oxides (HEOs) can possess long-range ordered magnetic states despite their extreme chemical disorder. Very little is known about how the different chemical constituent…
Charge distribution and magnetism in bilayer LaNiO: a hybrid functional study
Kateryna Foyevtsova, Ilya Elfimov, George A. Sawatzky
An accurate understanding of the ground state electronic properties of LaNiO, a high-temperature superconductor under pressure, is key for unveiling the origin of its s…
Percolative Pathway to Stripe Order in KTaO3-Based Superconductivity
Zhihao Chen, Chun Sum Brian Pang, Meng Yang +8
The sensitivity of low dimensional superconductors to fluctuations gives rise to emergent behaviors beyond the conventional Bardeen Cooper Schrieffer framework. Anisotropy is one s…
Universal electronic structure of multi-layered nickelates via oxygen-centered planar orbitals
Christine C. Au-Yeung, X. Chen, S. Smit +17
Superconductivity has been demonstrated in the family of multi-layered nickelates LaNiO and LaNiO. Key questions remain open regarding the low-energy ele…
Atomic and bond polarization causing strong screening of short-range Coulomb interactions and its effect in cuprate superconductors
Nassim Derriche, George Sawatzky
We present a novel and efficient real space, semiclassical model of electric polarization with general applicability to any system in which screening plays an important role. This…