Room-Temperature Voltage Tunable Phonon Thermal Conductivity via Reconfigurable Interfaces in Ferroelectric Thin Films

Abstract

Dynamic control of thermal transport in solid-state systems is a transformative capability with the promise to propel technologies including phononic logic, thermal management, and energy harvesting. A solid-state solution to rapidly manipulate phonons has escaped the scientific community. We demonstrate active and reversible tuning of thermal conductivity by manipulating the nanoscale ferroelastic domain structure of a Pb(Zr0.3Ti0.7)O3 film with applied electric fields. With subsecond response times, the room-temperature thermal conductivity was modulated by 11%.

Novel Poly(m‐phenyleneisophthalamide) Dielectric Composites with Enhanced Thermal Conductivity and Breakdown Strength Utilizing Functionalized Boron Nitride Nanosheets

“…[36,37] The interfacial thermal resistance (Kapitza resistance) formed by mismatch in the vibrational harmonics of phonons and poor interfacial compatibility between fillers and polymer can decrease phonons' mean free path and lead to heat-carrying phonons scattering during propagation, further resulting in decreasing the efficiency of fillers on enhancing www.advancedsciencenews.com www.mme-journal.de thermal conduction of polymer. [38] Therefore, the modification of polymer-filler interfaces is essential and beneficial to alleviate interface thermal resistance and enhance interfacial compatibility. By this method, the phonons scattering can be effectively restrained to strengthen efficiency of phonons transfer and improve thermal conduction in composite.…”

Analysis of the temperature dependence of the thermal conductivity of insulating single crystal oxides

“…[32][33][34] Ferroelectric domain walls have been shown to be a source of phonon scattering, reducing the thermal conductivity. 35,36 Therefore, although the values of A must be taken carefully because of the increasing inaccuracy in the determination of the lowest temperature κ(T), the observed trend could indeed suggest an effect of ferroelectric domain-boundary scattering in LiTaO 3 .…”

Grain size-induced thermo-mechanical coupling in zirconium thin films

“…However, their specimens were attached to the substrate, which makes it very difficult to isolate the role of mechanical strain from the substrate accurately. A more recent study on ferroelastic Pb(Zr 0.3-Ti 0.7 )O 3 films with nanoscale domain structure showed up to 11 % change in thermal conductivity due to the electrical field-assisted domain re-structuring [14]. Such active and reversible tuning of thermal conductivity shows that phonon-based transport can also be tuned by mechanical strain.…”