Heat Transport Hysteresis Generated Through Frequency Switching of a Time-Dependent Temperature Gradient
A stochastic energetics framework is applied to examine how periodically shifting the frequency of a time-dependent oscillating temperature gradient affects heat transport in a nanoscale molecular model. We specifically examine the effects that frequency switching, i.e., instantaneously changing the...
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MDPI AG
2024-12-01
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| author | Renai Chen Galen T. Craven |
| author_facet | Renai Chen Galen T. Craven |
| author_sort | Renai Chen |
| collection | DOAJ |
| description | A stochastic energetics framework is applied to examine how periodically shifting the frequency of a time-dependent oscillating temperature gradient affects heat transport in a nanoscale molecular model. We specifically examine the effects that frequency switching, i.e., instantaneously changing the oscillation frequency of the temperature gradient, has on the shape of the heat transport hysteresis curves generated by a particle connected to two thermal baths, each with a temperature that is oscillating in time. Analytical expressions are derived for the energy fluxes in/out of the system and the baths, with excellent agreement observed between the analytical expressions and the results from nonequilibrium molecular dynamics simulations. We find that the shape of the heat transport hysteresis curves can be significantly altered by shifting the frequency between fast and slow oscillation regimes. We also observe the emergence of features in the hysteresis curves such as pinched loops and complex multi-loop patterns due to the frequency shifting. The presented results have implications in the design of thermal neuromorphic devices such as thermal memristors and thermal memcapacitors. |
| format | Article |
| id | doaj-art-dab7ffeeefd047d283ae39eb72abf6c5 |
| institution | Kabale University |
| issn | 1099-4300 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Entropy |
| spelling | doaj-art-dab7ffeeefd047d283ae39eb72abf6c52025-01-24T13:31:41ZengMDPI AGEntropy1099-43002024-12-012711810.3390/e27010018Heat Transport Hysteresis Generated Through Frequency Switching of a Time-Dependent Temperature GradientRenai Chen0Galen T. Craven1Theoretical Division and Center for Nonlinear Studies, Los Alamos National Laboratory, Los Alamos, NM 87545, USATheoretical Division, Los Alamos National Laboratory, Los Alamos, NM 87545, USAA stochastic energetics framework is applied to examine how periodically shifting the frequency of a time-dependent oscillating temperature gradient affects heat transport in a nanoscale molecular model. We specifically examine the effects that frequency switching, i.e., instantaneously changing the oscillation frequency of the temperature gradient, has on the shape of the heat transport hysteresis curves generated by a particle connected to two thermal baths, each with a temperature that is oscillating in time. Analytical expressions are derived for the energy fluxes in/out of the system and the baths, with excellent agreement observed between the analytical expressions and the results from nonequilibrium molecular dynamics simulations. We find that the shape of the heat transport hysteresis curves can be significantly altered by shifting the frequency between fast and slow oscillation regimes. We also observe the emergence of features in the hysteresis curves such as pinched loops and complex multi-loop patterns due to the frequency shifting. The presented results have implications in the design of thermal neuromorphic devices such as thermal memristors and thermal memcapacitors.https://www.mdpi.com/1099-4300/27/1/18memristormemcapacitorheat transport |
| spellingShingle | Renai Chen Galen T. Craven Heat Transport Hysteresis Generated Through Frequency Switching of a Time-Dependent Temperature Gradient Entropy memristor memcapacitor heat transport |
| title | Heat Transport Hysteresis Generated Through Frequency Switching of a Time-Dependent Temperature Gradient |
| title_full | Heat Transport Hysteresis Generated Through Frequency Switching of a Time-Dependent Temperature Gradient |
| title_fullStr | Heat Transport Hysteresis Generated Through Frequency Switching of a Time-Dependent Temperature Gradient |
| title_full_unstemmed | Heat Transport Hysteresis Generated Through Frequency Switching of a Time-Dependent Temperature Gradient |
| title_short | Heat Transport Hysteresis Generated Through Frequency Switching of a Time-Dependent Temperature Gradient |
| title_sort | heat transport hysteresis generated through frequency switching of a time dependent temperature gradient |
| topic | memristor memcapacitor heat transport |
| url | https://www.mdpi.com/1099-4300/27/1/18 |
| work_keys_str_mv | AT renaichen heattransporthysteresisgeneratedthroughfrequencyswitchingofatimedependenttemperaturegradient AT galentcraven heattransporthysteresisgeneratedthroughfrequencyswitchingofatimedependenttemperaturegradient |