Work

Narrowing of the Flexural Phonon Spectral Line in Stressed Crystalline Two-Dimensional Materials

Year: 2024

Type: article

Abstract: We develop the microscopic theory for the attenuation of out-of-plane phonons in stressed flexible two-dimensional crystalline materials. We demonstrate that the presence of nonzero tension strongly reduces the relative magnitude of the attenuation and, consequently, results in parametrical narrowing of the phonon spectral line due to stress-controlled suppression of the retardation effects in the dynamically screened inter phonon interaction. We predict the specific power-law dependence of the spectral-line width on temperature and tension. We speculate that suppression of the phonon attenuation by nonzero tension might be responsible for high quality factors of mechanical nanoresonators based on flexural two-dimensional materials.

Source: Physical Review Letters

DOI: 10.1103/physrevlett.133.136203

Authors: A. D. Kokovin, V. Yu. Kachorovskii, I. S. Burmistrov

Institutions: Moscow Institute of Physics and Technology, Landau Institute for Theoretical Physics, Ioffe Institute, National Research University Higher School of Economics

Language: English

Topic: Mechanical and Optical Resonators

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: Russian Science Foundation, Ministry of Science and Higher Education of the Russian Federation, Foundation for the Advancement of Theoretical Physics and Mathematics

Award: G5897680343