Publications by authors named "A Yu Kuzmenko"
Twisted bilayer graphene (TBG) represents a highly tunable, strongly correlated electron system. However, understanding the single-particle band structure alone has been challenging due to a lack of spectroscopic measurements over a broad energy range. Here, we probe the band structure of TBG around the magic angle using infrared spectroscopy and reveal spectral features that originate from interband transitions.
View Article and Find Full Text PDFAim: To evaluate the efficacy and safety of UroBest complex in sachets for combined therapy of patients with acute cystitis in comparison with products of similar composition.
Materials And Methods: The randomized multi-center study included 90 patients with acute cystitis aged 18 to 49 years who were treated at the clinical bases of SRC FMBC, FMBA of Russia, Moscow, Russia, Altai State Medical University and Voronezh State Medical University named after N.N.
Phonon polaritons (PhPs), light coupled to lattice vibrations, in the highly anisotropic polar layered material molybdenum trioxide (α-MoO) are currently the focus of intense research efforts due to their extreme subwavelength field confinement, directional propagation, and unprecedented low losses. Nevertheless, prior research has primarily concentrated on exploiting the squeezing and steering capabilities of α-MoO PhPs, without inquiring much into the dominant microscopic mechanism that determines their long lifetimes, which is key for their implementation in nanophotonic applications. This study delves into the fundamental processes that govern PhP damping in α-MoO by combining calculations with scattering-type scanning near-field optical microscopy (s-SNOM) and Fourier transform infrared (FTIR) spectroscopy measurements across a broad temperature range (8-300 K).
View Article and Find Full Text PDFArticle Synopsis
- Polaritons are quasiparticles formed from light and matter that influence how quantum materials respond optically, making them useful for technologies like communication and sensing at the nanoscale.
- The study focuses on Landau-phonon polaritons (LPPs) found in magnetized, charge-neutral graphene that is encapsulated in a material called hexagonal boron nitride (hBN), revealing new interactions between different particle modes.
- Using a technique called infrared magneto-nanoscopy, researchers discovered that they can completely stop the movement of LPPs at specific magnetic fields, which challenges traditional optical rules and provides insights into critical phenomena related to electrons in the material.