Electric-Field Control of the Local Thermal Conductivity in Charge Transfer Oxides.

ABSTRACT: Phonons, the collective excitations responsible for heat transport in crystalline insulating solids, lack electric charge or magnetic moment, which complicates their active control via external fields. This presents a significant challenge in designing thermal equivalents of basic electronic circuit elements, such as transistors or diodes. Achieving these goals requires precise and reversible modification of thermal conductivity in materials. In this work, the continuous tuning of local thermal conductivity in charge-transfer SrFeO_3-x and La_0.6Sr_0.4CoO_3-x oxides using a voltage-biased Atomic Force Microscopy (AFM) tip at room temperature is demonstrated. This method allows the creation of micron-sized domains with well-defined thermal conductivit

SUBMITTER: Varela-Dominguez N 

PROVIDER: S-EPMC11756041 | biostudies-literature | 2025 Jan

REPOSITORIES: biostudies-literature