Browsing by Author "Shah P.B."

Filter results by typing the first few letters
Now showing 1 - 1 of 1
  • No Thumbnail Available
    Item
    Temperature-dependent phonon shifts in monolayer MoS2
    (2013) Lanzillo N.A.; Glen Birdwell A.; Amani M.; Crowne F.J.; Shah P.B.; Najmaei S.; Liu Z.; Ajayan P.M.; Lou J.; Dubey M.; Nayak S.K.; O'Regan T.P.
    We present a combined experimental and computational study of two-dimensional molybdenum disulfide and the effect of temperature on the frequency shifts of the Raman-active E 2 g and A 1 g modes in the monolayer. While both peaks show an expected red-shift with increasing temperature, the frequency shift is larger for the A 1 g mode than for the E 2 g mode. This is in contrast to previously reported bulk behavior, in which the E 2 g mode shows a larger frequency shift with temperature. The temperature dependence of these phonon shifts is attributed to the anharmonic contributions to the ionic interaction potential in the two-dimensional system. � 2013 AIP Publishing LLC.