New magneto-polaron resonances in a monolayer of a transition metal dichalcogenide

Abstract

Transition metal dichalcogenide (TMD) semiconductors are two-dimensional materials with great potential for the future of nano-optics and nano-optoelectronics as well as the rich and exciting development of basic research. The influence of an external magnetic field on a TMD monolayer raises a new question: to unveil the behavior of the magneto-polaron resonances (MPRs) associated with the phonon symmetry inherent in the system. It is shown that the renormalized Landau energy levels are modified by the interplay of the long-range Pekar–Fröhlich (PF) and short-range deformation potential (DP) interactions. This leads to a new series of MPRs involving the optical phonons at the center of the Brillouin zone. The coupling of the two Landau levels with the LO and $$A_1$$ A 1 optical phonon modes provokes resonant splittings of double avoided-crossing levels giving rise to three excitation branches. This effect appears as bigger energy gaps at the anticrossing points in the renormalized Landau levels. To explore the interplay between the MPRs, the electron-phonon interactions (PF and DP) and the couplings between adjacent Landau levels, a full Green’s function treatment for the evaluation of the energy and its life-time broadening is developed. A generalization of the two-level approach is performed for the description of the new MPR branches. The obtained results are a guideline for the magneto-optical experiments in TMDs, where three MPR peaks should be observable.

Lattice vibration modes and electron–phonon interactions in monolayer vs. bilayer of transition metal dichalcogenides

“…For studies of electronic transport, 35 optoelectronic applications, 36,37 phonon damping, 38 limited phonon mobility, 39 quantum phononics, 40 magneto-polaron resonances, 41 dielectric and optical properties, 42 in 2D structures, it is necessary to address the role of the phonon spectra and its interactions with charge carriers in these novel materials. The layered single and 2ML structures present interesting features for light–matter interactions and the aforementioned topics.…”

“…27,28 In addition to ferroelectricity applications, 2ML, and multilayer TMDs exhibit a higher density of states, carrier mobility, and stability at room temperature, giving them superior performance in various applications. [29][30][31][32][33][34] For studies of electronic transport, 35 optoelectronic applications, 36,37 phonon damping, 38 limited phonon mobility, 39 quantum phononics, 40 magneto-polaron resonances, 41 dielectric and optical properties, 42 in 2D structures, it is necessary to address the role of the phonon spectra and its interactions with charge carriers in these novel materials. The layered single and 2ML structures present interesting features for light-matter interactions and the aforementioned topics.…”

Study the effect of generating randomly rough interfaces on electron transport properties across the heterostructures

“…Study the electron transport through heterostructures and multilayers has been interested in various experimental and theoretical researches in the past decades [1][2][3][4]. The quantum effect, the surface evolution of materials and the important physical properties of the low-dimensional systems have been explored with different techniques [5][6][7].…”

Genetic descriptor search algorithm for predicting hydrogen adsorption free energy of 2D material

“…These properties make TMDs suitable for various applications, such as catalysis, energy storage, and sensing. As a result, many recent studies 2 – 4 in materials science have focused on the synthesis, characterization, and applications of TMDs.…”