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Researchers introduce twisted thermotics, a new field analogous to twistronics, to control heat diffusion. Twisting a thermal system allows for switching between heat cloaking and concentration, enabling tunable thermal management.

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Area of Science:

  • Physics
  • Materials Science
  • Thermal Engineering

Background:

  • Twistronics, based on the moiré magic angle in twisted bilayer graphene, has enabled control over electron properties.
  • Opto-twistronics extends these principles to optics, but a thermal analogue remains elusive due to the nature of heat diffusion.
  • The concept of a 'magic angle' is ill-defined for heat diffusion, hindering thermal control analogous to electronic or photonic systems.

Purpose of the Study:

  • To introduce and experimentally validate a thermal analogue of the magic angle effect for heat diffusion.
  • To demonstrate tunable control over heat flow using twisted thermal configurations.
  • To establish a new field of 'twisted thermotics' within the broader scope of twistronics.

Main Methods:

  • Development of a twisted diffusion system with tailored thermal coupling.
  • Experimental validation of heat diffusion manipulation through controlled twisting.
  • Observation of functional switching between heat cloaking and concentration effects.

Main Results:

  • Successful demonstration of an analog thermal magic angle effect.
  • Experimental evidence of switching heat diffusion from cloaking to concentration by twisting the system.
  • Validation of twisted thermotics as a viable approach for thermal management.

Conclusions:

  • Twisted thermotics offers a novel pathway for precise control over heat diffusion.
  • The established principles open avenues for manipulating thermal fields in various configurations, including fluids.
  • This work expands the universal applicability of twistronics into the thermal domain, creating new possibilities for thermal engineering.