Temperonic Crystal: A Superlattice for Temperature Waves in Graphene

Year: 2020

Authors: Gandolfi M., Giannetti C., Banfi F.

Autors Affiliation: CNR INO Natl Inst Opt, Via Branze 45, I-25123 Brescia, Italy; Univ Brescia, Dept Informat Engn, Via Branze 38, I-25023 Brescia, Italy; Univ Cattolica Sacro Cuore, Dept Phys, Via Musei 41, I-25121 Brescia, Italy; Univ Cattolica Sacro Cuore, Interdisciplinary Labs Adv Mat Phys I LAMP, Via Musei 41, I-25121 Brescia, Italy; Univ Claude Bernard Lyon 1, Inst Lumiere Matiere, CNRS, FemtoNanoOpt Grp,Univ Lyon, F-69622 Villeurbanne, France.

Abstract: The temperonic crystal, a periodic structure with a unit cell made of two slabs sustaining temperature wavelike oscillations on short timescales, is introduced. The complex-valued dispersion relation for the temperature scalar field is investigated for the case of a localized 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.

Journal/Review: PHYSICAL REVIEW LETTERS

Volume: 125 (26)      Pages from: 265901-1  to: 265901-5

More Information: M. G. acknowledges financial support from the CNR Joint Laboratories program 2019-2021. C. G. acknowledges support from Universit’a Cattolica del Sacro Cuore through D.2.2 and D.3.1 grants, from MIUR through PRIN 2015 (Prot 2015C5SEJJ001) and PRIN 2017 (Prot. 20172H2SC4_005) programs. Universit’a Cattolica del Sacro Cuore contributed to the funding for open-access publication of this work. F. B. acknowledges financial support from Universit ’ e de Lyon in the frame of the IDEXLYON Project (ANR-16-IDEX-0005) and from Universit ’ e Claude Bernard Lyon 1 through the BQR Accueil EC 2019 grant.
KeyWords: Heat-conduction; Thermal-conductivity; Phonon Transport; Metamaterials; Fundamentals; Graphite; Behavior
DOI: 10.1103/PhysRevLett.125.265901

Citations: 30
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