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arXiv 2012.01035cond-mat.mes-hall
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Temperonic Crystal:石墨烯中温度波的超晶格

Temperonic Crystal: a superlattice for temperature waves in graphene

Marco Gandolfi, Claudio Giannetti, Francesco Banfi

摘要:

介绍了一种由两块平板构成的单胞周期结构的温子晶体,它能在短时间尺度上维持温度波动。研究了局部温度脉冲情形下温度标量场的复值色散关系。色散揭示了频率间隙,其在改变板的热性质时可调谐。结果示出了基于石墨烯的温子晶体的典型情况。温子晶体将超晶格的概念扩展到温度波的领域,允许在液氮温度以上的流体动力学状态中对超快温度脉冲进行相干控制。

英文摘要:

The temperonic crystal, a periodic structure with a unit cell made of two slabs sustaining temperature wave-like oscillations on short time-scales, is introduced. The complex-valued dispersion relation for the temperature scalar field is investigated for the case of a localised temperature pulse. The dispersion discloses frequency gaps, tunable upon varying the slabs thermal properties. Results are shown for the paradigmatic case of a graphene-based temperonic crystal. The temperonic crystal extends the concept of superlattices to the realm of temperature waves, allowing for coherent control of ultrafast temperature pulses in the hydrodynamic regime at above liquid nitrogen temperatures.

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