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The effect of nonlinearity on the efficiency of a thermal rectifier in the form of a junction of two chains
European Physical Journal: Special Topics. 2025. P. 1–13.
Dmitriev Sergey V., Xiong D., Borisov D., Velarde M.
A thermal diode or rectifier is a heat conductor whose thermal conductivity depends on the sign of the temperature gradient. The junction of two beta-Fermi-Pasta-Ulam-Tsingou (β-FPUT) chains with anharmonic on-site potentials is considered here as a thermal rectifier. First, the linear case is analyzed and it is shown that in thermal equilibrium, when the energy is uniformly distributed among all phonon modes, the energy flux through the junction does not depend on its direction, in other words, the junction of harmonic chains does not act as a thermal diode. The thermal diode effect is observed in the harmonic system when the energy is unevenly distributed among the phonons. It is also observed when anharmonic ity is taken into account. The results of this work are useful in analyzing the thermal conductivity of nanomaterials.
Publication based on the results of:
Vladimir E. Antonov, Materials Chemistry and Physics 2025 Vol. 332 Article 130232
Multilayer graphane (hydride of graphite) is a crystalline hydrocarbon of composition CH, which can be synthesized
from graphite and molecular hydrogen at pressures above 2 GPa [V.E. Antonov et al. Carbon 100 (2016)
465]. Using X-ray diffraction, this compound was tentatively identified as the “graphane II” phase of 3D-graphane
predicted by ab initio calculations [X.-D. Wen et al. ...
Added: March 26, 2026
Azat F. Aminov, Alexey A. Sokolik, Optics Letters 2025 Vol. 50 No. 11 P. 3728–3731
Surface plasmons or phonons propagating on a two-dimensional (2D) material can exhibit coupling with resonant excitations in its substrate, and the resulting coupled modes were extensively studied. Similar coupling of edge modes propagating along a boundary of the 2D material with substrate excitations remains unexplored. This paper aims to bridge this gap by investigating the ...
Added: September 16, 2025
Baeva E., Kolbatova A. I., Titova N. A. et al., Physical Review B: Condensed Matter and Materials Physics 2024 Vol. 110 No. 10 Article 104519
We investigate the temporal and spatial scales of resistance fluctuations (𝑅 fluctuations) at the superconducting resistive transition accessed through voltage fluctuation measurements in thin epitaxial TiN films. This material is characterized by slow electron-phonon relaxation, which puts it far beyond the applicability range of the textbook scenario of superconducting fluctuations. The measured Lorentzian spectrum of the 𝑅 fluctuations ...
Added: October 26, 2024
Bogdanova T. V., D. V. Kalyabin, A. R. Safin et al., Journal of Physics D: Applied Physics 2023 Vol. 56 No. 20 Article 205301
In this work we present a model explaining the properties of magnetoelastic waves propagation in the heterostructure containing an antiferromagnetic layer on a non-magnetic elastic substate. Horizontally polarized shear surface waves (SH-waves) propagating in thin film are Love waves. The dispersion characteristic of magnetoelastic waves in such structure was obtained, and the effect of variation ...
Added: January 31, 2024
Blank T. G., Grishunin K. A., K. A. Zvezdin et al., Physical Review Letters 2023 Vol. 131 No. 2 Article 026902
The interaction of a single-cycle terahertz electric field with the topological insulator MnBi2Te4 triggers strongly anharmonic lattice dynamics, promoting fully coherent energy transfer between the otherwise noninteracting Raman-active Eg and infrared (IR)-active Eu phononic modes. Two-dimensional terahertz spectroscopy combined with modeling based on the classical equations of motion and symmetry analysis reveals the multistage process underlying the excitation of the ...
Added: January 14, 2024
Vasilisa E. Anikeeva, Kirill N. Boldyrev, Semenova O. et al., Optical Materials: X 2023 Vol. 20 Article 100259
Vibrational and structural properties have an enormous influence on optoelectronic properties of hybrid halide perovskites CH3NH3PbX3 (X = I, Br, Cl), which are perspective materials for different photovoltaic applications. Here, we report results of the first high-resolution optical spectroscopy measurements of large CH3NH3PbBr3 single crystals in wide frequency (20–20 000 cm−1) and temperature (5–300 K) ...
Added: September 6, 2023
I. P. Koroleva (Kikot), Kosevich Y. A., Physical Review E - Statistical, Nonlinear, and Soft Matter Physics 2023 Vol. 107 No. 5 Article 054217
The paper is devoted to analytical and numerical studies of the effects of nonlinearity on the two-path phonon
interference in the transmission through two-dimensional arrays of atomic defects embedded in a lattice. The
emergence of transmission antiresonance (transmission node) in the two-path system is demonstrated for the
few-particle nanostructures, which allow us to model both linear and nonlinear ...
Added: May 18, 2023
Antonov Vladimir E., Fedotov V., Ivanov A. et al., Journal of Alloys and Compounds 2022 Vol. 905 Article 164208
Due to the small mass and anomalously large neutron scattering cross-section of proton (about 80 barns compared to a few barns for other nuclei), inelastic neutron scattering is considered as one of the most effective tools in studying optical vibrations of hydrogen atoms in metal hydrides. The current review is focused on the binary hydrides ...
Added: February 26, 2022
Kuzovnikov M., Antonov V., Hansen T. et al., Journal of Alloys and Compounds 2022 Vol. 893 Article 162299
It is currently known that three hydrides – PdHx, MoHx, and TiHx – exhibit an inverse isotope effect in superconductivity. Namely, the phase with a heavier hydrogen isotope, deuterium, has a higher critical temperature. Hydrides and deuterides of palladium have intensively been studied both experimentally and theoretically, but the origin of the isotope effect has ...
Added: October 23, 2021
Oleg I. Utesov, Yashenkin A., Koniakhin S., Journal of Physical Chemistry C 2018 Vol. 122 No. 39 P. 22738–22749
A simple way to investigate theoretically the Raman spectra (RS) of nonpolar nanoparticles is proposed. For this aim, we substitute the original lattice optical phonon eigenproblem by the continuous Klein−Fock−Gordon-like equation with Dirichlet boundary conditions. This approach provides the basis for the continuous description of optical phonons in the same manner how the elasticity theory ...
Added: January 16, 2021
Goltsman G., Zhang W., Miao W. et al., Superconductor Science and Technology 2014 Vol. 27 No. 8 P. 085013
In this paper we study the temperature dependence of the receiver noise temperature and IF noise bandwidth of superconducting hot electron bolometer (HEB) mixers. Three superconducting NbN HEB devices of different transition temperatures (Tc) are measured at 0.85 THz and 1.4 THz at different bath temperatures (Tbath) between 4 K and 9 K. Measurement results ...
Added: February 24, 2016
Eminov P. A., Ul’din A., Sezonov Y. I., Physics of the Solid State 2011 Vol. 53 No. 8 P. 1701–1713
The contribution of electron–phonon scattering to conductivity of a quantum cylinder in a lon-gitudinal magnetic field has been studied. It has been shown that the conductivity of the nanotube undergoes Aharonov–Bohm oscillations with variations in the magnetic flux through the nanotube cross section. The formulas describing the temperature dependence of the resistance of the nanostructure ...
Added: April 12, 2012