Effect of annealing on the temperature-dependent dielectric properties of LaAlO3 at terahertz frequencies

• Main Authors: Zou, Xingquan, He, Mi, Springer, Daniel, Lee, Dongwook, Cheong, Siew Ann, Wu, Tom, Panagopoulos, Christos, Nair, Saritha K., Talbayev, D., Chia, Elbert E. M.
• Other Authors: School of Physical and Mathematical Sciences
• Format: Article
• Language: English
• Published: 2013
• Subjects: DRNTU::Science::Physics::Heat and thermodynamics
• Online Access: https://hdl.handle.net/10356/96011; http://hdl.handle.net/10220/10078
• Institution: Nanyang Technological University

We present THz conductivity of LaAlO3 (LAO) as a function of temperature and annealing, using terahertz time-domain spectroscopy (THz-TDS). We observed that, after annealing, spectral weight redistribution occurs, such that the real conductivity σ1(ω) changed from a featureless and almost frequency-...