2-7 June 2019
Simon Fraser University
America/Vancouver timezone
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Terahertz conductivity measurements of MnSi

3 Jun 2019, 11:30
15m
SWH 10081 (Simon Fraser University)

SWH 10081

Simon Fraser University

Oral not-in-competition (Graduate Student) / Orale non-compétitive (Étudiant(e) du 2e ou 3e cycle) Condensed Matter and Materials Physics / Physique de la matière condensée et matériaux (DCMMP-DPMCM) M1-11 Probing and controlling matter with light I (DCMMP) | Sonder et contrôler la matière avec de la lumière I (DPMCM)

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.

Primary 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)

Presentation Materials

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