title: Temperature-dependent nonlinear phonon shifts in a supported MoS2 monolayer.
abstract: We report Raman spectra measurements on a MoS(2) monolayer supported on SiO(2) as a function of temperature. Unlike in previous studies, the positions of the two main Raman modes, E(2g)(1) and A(1g) exhibited nonlinear temperature dependence. Temperature dependence of phonon shifts and widths is explained by optical phonon decay process into two acoustic phonons. On the basis of Raman measurements, local temperature change under laser heating power at different global temperatures is derived. Obtained results contribute to our understanding of the thermal properties of two-dimensional atomic crystals and can help to solve the problem of heat dissipation, which is crucial for use in the next generation of nanoelectronic devices.
authors.affiliation: Faculty of Physics, Warsaw University of Technology , Koszykowa 75, 00-662 Warsaw, Poland.
authors.forename: Andrzej
authors.initials: A
authors.lastname: Taube
authors.forename: Jarosław
authors.initials: J
authors.lastname: Judek
authors.forename: Cezariusz
authors.initials: C
authors.lastname: Jastrzębski
authors.forename: Anna
authors.initials: A
authors.lastname: Duzynska
authors.forename: Krzysztof
authors.initials: K
authors.lastname: Świtkowski
authors.forename: Mariusz
authors.initials: M
authors.lastname: Zdrojek