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131 papers
Mixed-valence state in the dilute-impurity regime of La-substituted SmB
Marta Zonno, Matteo Michiardi, Fabio Boschini +11
Homogeneous mixed-valence (MV) behaviour is one of the most intriguing phenomena of -electron systems. Despite extensive efforts, a fundamental aspect which remains unsettled is…
Correlation Induced Magnetic Topological Phases in Mixed-Valence Compound SmB6
Huimei Liu, Moritz M. Hirschmann, George A. Sawatzky +2
SmB6 is a mixed-valence compound with flat f-electron bands that have a propensity to magnetism. Here, using a realistic Gamma8 quartet model, we investigate the dynamical spin sus…
Entropy engineering and tunable magnetic order in the spinel high entropy oxide
Graham H. J. Johnstone, Mario U. González-Rivas, Keith M. Taddei +5
Spinel oxides are an ideal setting to explore the interplay between configurational entropy, site selectivity, and magnetism in high entropy oxides. In this work we characterize th…
Stabilization of singlet hole-doped state in infinite-layer nickelate superconductors
Mi Jiang, Mona Berciu, George A. Sawatzky
Motivated by the recent X-ray absorption spectroscopy (XAS) and resonant inelastic X-ray scattering (RIXS) experiments, we use a detailed impurity model to explore the nature of th…
Distinct electridelike nature of infinite-layer nickelates and the resulting theoretical challenges to calculate their electronic structure
Kateryna Foyevtsova, Ilya Elfimov, George A. Sawatzky
We demonstrate in this paper that the recently discovered infinite-layer (IL) nickelates have much in common with a class of materials known as electrides. Oxide based electrides a…
Modulation doping of the FeSe monolayer on SrTiO
Fengmiao Li, Ilya Elfimov, George A. Sawatzky
The discovery of higher-temperature superconductivity in FeSe monolayers on SrTiO (STO) substrates has sparked a surge of interest in the interface superconductivity. One point…