Li, S and Ding, X and Ren, J and Li, J and Sun, J and Salje, E. K. H. (2013) Mechanical Controlled Thermal Switch and Hysteresis with Domain Boundary Engineered Phonon Transport. Condensed Matter Materials Science.
1310.2879.pdf - Submitted Version
Download (2MB) | Preview
Heat flow control in phononics has received significant attention recently due to its widespread applications in energy transfer, conversion and utilization. Here, we demonstrate that by applying external stress or strain we can effectively tune the thermal conductivity through changing the density of twin boundaries, which in turn offers the intriguing mechanical-controlled thermal switch and hysteresis operations. Twin boundaries perpendicular to the transport direction strongly scatter phonons. As such, the heat flow is in inverse proportional to the density of twin boundaries and hence allows an excellent way to switch thermal conductivity mechanically and even leads to the interesting hysteresis behavior as a thermal memory. Our study provides a novel mechanism to couple thermal and mechanical properties of materials as a matter of \"domain boundary engineering\" and can have substantial implications in flexible thermal control and thermal energy harvesting.
|Uncontrolled Keywords:||2013AREP; IA67;|
|Subjects:||03 - Mineral Sciences|
|Divisions:||03 - Mineral Sciences
08 - Green Open Access
|Journal or Publication Title:||Condensed Matter Materials Science|
|Depositing User:||Sarah Humbert|
|Date Deposited:||09 Jul 2015 18:11|
|Last Modified:||09 Jul 2015 18:11|
Actions (login required)