Speaker
Laleh Mohtashemi
(Simon Fraser University)
Description
We will present time-domain terahertz spectroscopy measurements of the optical conductivity of MnSi thin films. Measurements cover a temperature range T = 5−300 K and a frequency range ν = 0.1−4 THz. We find that at low temperatures and frequencies, the scattering rate is proportional to both the square of the temperature and the square of the frequency, as predicted Fermi liquid theory. As the temperature increases further, the system loses quasiparticle coherence, while the plasma frequency inferred from a Drude fit decreases dramatically.
Authors
Laleh Mohtashemi
(Simon Fraser University)
Mr
F. Michael Bartram
Amir Farahani
Eric Karho
Theodore L. Monchesky
(Department of Physics, Dalhousie University, Canada)
J. Steven Dodge
(Department of Physics, Simon Fraser University, Canada)
