Enlargement of band gaps on thermal wave crystals by using heterostructures

Gerardo Morales-Morales, Jesus Manzanares-Martinez*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

Thermal wave crystals are periodic structures that support temperature wave oscillations. In these lattices, band gaps exist for heat flow due to interference phenomena. In this work, we demonstrate how heterostructures—a stack of two different lattices—can be used to increase band gaps. We investigate two distinct periodic structures. The first is a biological composite made up of stratum-like and dermal-like materials where we have found a band gap enlargement from 1.93 to 10.08 Hz. The second is composed of two semiconductors, silicon (Si) and germanium (Ge), where we have designed a heterostructure with a band gap ranging 0.096 to 0.17 Thz. The design of heterostructures to increase band gaps is especially useful when there is a low contrast of material parameters, as is the case of semiconductors.

Original languageEnglish
Article number106019
JournalResults in Physics
Volume42
DOIs
StatePublished - Nov 2022

Bibliographical note

Publisher Copyright:
© 2022 The Authors

Keywords

  • Band gap
  • Heterostructure
  • Temperature oscillation
  • Thermal wave

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