Selective heating of the ferroelectric film soft mode phonons
A.M. Prudan, A.V. Mezenov, S.A. Ktitorov
TL;DR
This study experimentally investigates how electromagnetic pumping at 0.3 THz can selectively heat soft mode phonons in (Ba, Sr)TiO3 films, revealing significant phonon overheating effects through capacitance measurements.
Contribution
It provides new experimental evidence of selective soft mode phonon heating in ferroelectric films using terahertz electromagnetic pumping.
Findings
Significant overheating of soft mode phonons observed
Capacitance changes used to estimate phonon temperature increase
Demonstrates potential for phonon control via electromagnetic pumping
Abstract
Results of the experimental study of the electromagnetic pumping of frequency 0.3 THz upon the soft mode phonons in the (Ba, Sr)TiO3 film are presented. Some features of the phonon state are revealed using the capacitor thermometer and the thermocouple. The soft mode phonon overheating estimated comparing changes of the planar capacitor capacitance was observed to be quite significant
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Taxonomy
TopicsAcoustic Wave Resonator Technologies · Advanced MEMS and NEMS Technologies