Research Scientist in Thermal Conductivity of Ferroelectric Materials

3 semanas atrás


Porto, Porto, Portugal Cnrs Tempo inteiro

Cnrs seeks a highly motivated Research Scientist to study the field tunability of thermal conductivity of ferroelectric materials. The successful candidate will work in two laboratories: GREMAN (UMR CNRS 7347) in Tours and LOMA (UMR CNRS 5798) in Bordeaux.

The project, part of the ERC Starting Grant "DYNAMHEAT", aims to explore an original mechanism based on the interaction between phonons and spontaneous planar defects in ferroelectric materials to design thermal switches.

Ferroelectric materials spontaneously exhibit regions of uniform polarization called domains, separated by planar defects called domain walls. The polarizations can be switched, and therefore the number of domains and their orientations controlled, by applying a voltage.

As the density of domain walls increases, the number of collisions between domain walls and phonons increases, and the thermal conductivity is reduced. Controlling the density of domain walls via the application of an electric field would therefore ultimately make it possible to develop a compact and efficient thermal switch over a wide temperature range.

The postdoctoral researcher will focus on the study of heat transport at small scales of time and space in ferroelectric materials in the form of single crystals, thin films, and superlattices. Thermal conductivity will be measured by thermoreflectance as a function of temperature and applied voltage.

We offer a competitive salary of €3,500 per month, commensurate with experience, and excellent opportunities for professional development. The position comes with full social benefits and a comprehensive pension scheme.

To succeed in this role, you should hold a doctorate in physics or materials science and have experience in thermoreflectance measurements and/or with pulsed lasers. Knowledge of ferroelectric materials would be appreciated.

Benefits:

  • A highly stimulating work environment
  • Competitive salary and benefits package
  • Opportunities for professional development


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