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114 papers
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…
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…
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…
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…
Superconductivity in the spin-state crossover materials: Nickelates with planar-coordinated low-spin Ni ions
Jiří 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…
Orbital Order and Superconductivity in Bilayer Nickelate Compounds
Giniyat Khaliullin, Jiří 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^…