Temperonic Crystal: A Superlattice for Temperature Waves in Graphene

Area of Science:

• Condensed matter physics
• Materials science
• Thermodynamics

Background:

• Superlattices traditionally control electron waves.
• Controlling heat waves (phonons) is crucial for thermal management.
• Ultrafast thermal phenomena require novel material structures.

Purpose of the Study:

• Introduce the concept of a temperonic crystal for thermal wave manipulation.
• Investigate the dispersion relation of temperature waves in this structure.
• Demonstrate tunable frequency gaps for coherent thermal pulse control.

Main Methods:

• Theoretical investigation of the complex-valued dispersion relation.
• Modeling a unit cell composed of two slabs.
• Analysis of a localized temperature pulse.
• Application to a graphene-based temperonic crystal.

Main Results:

• The temperonic crystal exhibits frequency band gaps in its thermal dispersion.
• These band gaps are tunable by altering the thermal properties of the slabs.
• Coherent control of ultrafast temperature pulses is achievable.

Conclusions:

• Temperonic crystals extend superlattice concepts to thermal waves.
• This provides a pathway for coherent control of heat pulses.
• Potential applications exist in thermal management above liquid nitrogen temperatures.