Researchers Develop Voltage Controlled Thermal Memory Using Ultra Thin Ferroelectric Films to "Switch" Heat Flow

New research enables "switching" heat flow on and off using ultra-thin ferroelectric films, creating stable thermal memory for future electronic management.

By: AXL Media

Published: Apr 20, 2026, 8:59 AM EDT

Source: Information for this report was sourced from EurekAlert!

The Challenge of Thermal Dissipation

Heat is one of the most difficult forms of energy to manage because of its inherent tendency to dissipate. While most technological efforts focus on confining or insulating heat, a collaborative research effort from the Center for Research in Biological Chemistry and Molecular Materials (CiQUS) has pivoted toward active control. By treating heat flow like electrical current, the team has developed a method to harness generated heat and use it as a medium for information storage through thermal memory.

Binary States of Conductivity

In a study published in Advanced Materials on March 30, 2026, the team introduced a device that functions similarly to conventional electronic bits. By applying small electric voltages, the material can be toggled between a state of high thermal conductivity ("on") and low thermal conductivity ("off"). Unlike simple insulators, this system is non-volatile, meaning it retains its specific thermal configuration even after the electrical stimulus is removed, effectively "remembering" its state.

Hafnium and Zirconium Oxide Nanofilms

The prototype utilizes ultra-thin films only a few nanometers thick composed of hafnium and zirconium oxide. The device’s functionality stems from the interplay between ferroelectric polarization and atomic defects known as oxygen vacancies. These vacancies act as physical barriers to heat transport. By manipulating the movement of these vacancies with a voltage, researchers can precisely regulate how easily heat propagates through the solid-state material.