Abstract Understanding the coupling between spin and phonons is critical for controlling lattice thermal conductivity ( κ l ) in magnetic materials, as we demonstrate here CrX 3 (X = Br I) monolayers. We show that these compounds exhibit large spin-phonon (SPC), dominated by out-of-plane vibrations of Cr atoms, resulting significantly different phonon dispersions ferromagnetic (FM) paramagnetic...

High-harmonic spectroscopy of solids is a powerful tool, which provides access to both electronic structure and ultrafast response solids, from their band density states phase transitions, including the emergence topological edge states, PetaHertz response. However, in spite these successes, high-harmonic has hardly been applied analyze role coherent femtosecond lattice vibrations attosecond He...

We use ultrafast optical spectroscopy to study the nonequilibrium quasiparticle relaxation dynamics of iron-based superconductor KCa$_2$Fe$_4$As$_4$F$_2$ with $T_c=33.5$ K. Our results reveal a possible pseudogap ($\Delta_{PG}$ = 2.4 $\pm$ 0.1 meV) below $T^*\approx 50$ K but prior opening superconducting gap ($\Delta_{SC}$(0) $\approx$ 4.3 meV). Measurements under high pump fluence real two di...

Charge transport plays a crucial role in manifold potential applications of two-dimensional materials, including field effect transistors, solar cells, and transparent conductors. At most operating temperatures, charge is hindered by scattering carriers lattice vibrations. Assessing the intrinsic phonon-limited carrier mobility thus paramount importance to identify promising candidates for next...

Magnetic excitations in layered magnetic materials that can be thinned down to the two-dimensional (2D) monolayer limit are of great interest from a fundamental point view and for applications. Raman scattering has played crucial role exploring properties and, even though it is essentially probe lattice vibrations, reflect ordering solids through spin-phonon interaction or observation magnon ex...

A simple semi-phenomenological model, which accurately predicts the dependence of thresholdcurrent for temperature of Resonant-phonon three well quantum cascade laser based on verticaltransitions is offered. We found that, the longitude optical phonon scattering of thermally excitedelectrons is the most important limiting factor for thermal performance of high frequency THz QCLs.In low frequenc...

In this paper, we present the spin-phonon coupling and dielectric response of nano-crystalline Pr$_2$CoMnO$_6$ employing Raman spectroscopic study. is a manganite compound , it undergoes paramagnetic to ferromagnetic (PM-FM) phase transition around $T_c$ $\sim$172 K. Temperature-dependent scattering experiment carried out across study behavior in material. The results from reveal an obvious sof...

Self-synchronization is a ubiquitous phenomenon in nature, which oscillators are collectively locked frequency and phase through mutual interactions. While self-synchronization requires the forced excitation of at least one oscillators, we demonstrate that this mechanism spontaneously appears due to activation from thermal fluctuations. By performing molecular dynamics simulations, platform sup...