6 papers
Triplon-mediated pairing and the superconducting gap structure in bilayer nickelates
Huimei Liu, Giniyat Khaliullin
We investigate the superconducting gap structure in bilayer nickelates within a model in which conduction bands of dx2-y2 symmetry coexist with localized d3z2-r2 spins. Strong inte…
Ultrasensitive strain modulation of terahertz magnons at a magnetic phase transition
Lichen Wang, Sajna Hameed, Yiran Liu +8
Antiferromagnets typically host spin-wave (magnon) excitations in the terahertz (THz) regime, offering a promising platform for high-speed magnonic information technologies. Harnes…
Orbital Order and Superconductivity in Bilayer Nickelate Compounds
Giniyat Khaliullin, JiÅÃ Chaloupka
We propose a theory for bilayer nickelate materials, where a large tetragonal field - intrinsic or induced by epitaxial strain - lifts the orbital degeneracy and localizes the $3z^…
Magnetism of the alternating monolayer-trilayer phase of LaNiO
Rustem Khasanov, Thomas J. Hicken, Hubertus Luetkens +9
Understanding the magnetic ground state of Ruddlesden-Popper nickelates is crucial, as these materials exhibit superconductivity under high pressure and host competing electronic o…
Superconductivity in the spin-state crossover materials: Nickelates with planar-coordinated low-spin Ni ions
JiÅÃ Chaloupka, Giniyat Khaliullin
We theoretically study quasi-two-dimensional nickel compounds, where the nickel ions assume Ni valence state and feature a low-spin ground state quasidegenerate…
Multiorbital character of the density wave in trilayer nickelate superconductors
A. Suthar, V. Sundaramurthy, M. Bejas +15
Ruddlesden-Popper nickelates exhibit high-temperature superconductivity closely intertwined with charge and spin density waves. However, fundamental questions persist regarding the…