2021/03/02 by M. Romero-Bastida, Jeanette-Ivonne Amaya-Durán
Engineering · Materials Science · Mathematics · Physics and Astronomy · #Acoustic Wave Phenomena Research #Acoustics #Computer science #Condensed matter physics #Harmonic oscillator #Independence (probability theory) #Lattice (music) #Materials science #Mathematics #Physics #Quantum mechanics #Rectification #Thermal #Thermal Radiation and Cooling Technologies #Thermal properties of materials #Thermodynamics #Voltage #Work (physics) #cond-mat.stat-mech #k-nearest neighbors algorithm
paper · pdf · doi:10.1103/physreve.103.032103
9 pages, 14 figures
arxiv created 2021/03/02 · openalex publication_date 2021/03/02 · arxiv updated 2021/03/03 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
In this work we study the asymmetric heat flow, i.e., thermal rectification, of a one-dimensional, mass-graded system consisting of a coupled harmonic oscillator lattice (ballistic spacer) and two diffusive leads attached to the boundaries of the former with both nearest-neighbor and next nearest-neighbor (NNN) interactions. The latter enhance the rectification properties of the system and specially its independence on system size. The system presents a maximum rectification efficiency for a very precise value of the parameter that controls the coupling strength of the NNN interactions that depend on the temperature range wherein the device operates. The origin of this maximum value is the asymmetric local heat flow response corresponding to the NNN contribution at both sides of the lighter mass-loaded diffusive lead as quantified by the spectral properties. Upon variation of the system's parameters the performance of the device is always enhanced in the presence of NNN interactions.