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Negative refraction in hyperbolic hetero-bicrystals
A. J. Sternbach, S. L. Moore, A. Rikhter +12
We visualized negative refraction of phonon polaritons, which occurs at the interface between two natural crystals. The polaritons - hybrids of infrared photons and lattice vibrati…
Quadrupolar excitons in a tunnel-coupled van der Waals heterotrilayer
Weijie Li, Zach Hadjri, Jin Zhang +7
Strongly bound excitons and many-body interactions between them determine light-matter interactions in van der Waals (vdW) heterostructures of 2D semiconductors. Unlike fundamental…
Attosecond magnetization dynamics in non-magnetic materials driven by intense femtosecond lasers
Ofer Neufeld, Nicolas Tancogne-Dejean, Umberto De Giovannini +2
Irradiating solids with ultrashort laser pulses is known to initiate femtosecond timescale magnetization dynamics. However, sub-femtosecond spin dynamics have not yet been observed…
Direct optical probe of magnon topology in two-dimensional quantum magnets
Emil Viñas Boström, Tahereh Sadat Parvini, James W. McIver +3
Controlling edge states of topological magnon insulators is a promising route to stable spintronics devices. However, to experimentally ascertain the topology of magnon bands is a…
Moiré Engineering of Nonsymmorphic Symmetries and Hourglass Superconductors
Yifan Gao, Ammon Fischer, Lennart Klebl +5
Moiré heterostructures hold the promise to provide platforms to tailor strongly correlated and topological states of matter. Here, we theoretically propose the emergence of an effe…
Unconventional Excitonic States with Phonon Sidebands in Layered Silicon Diphosphide
Ling Zhou, Junwei Huang, Lukas Windgaetter +16
Many-body interactions between quasiparticles (electrons, excitons, and phonons) have led to the emergence of new complex correlated states and are at the core of condensed matter…