纳米谐振器中的热膨胀
Thermal expansion in nanoresonators
摘要：
受最近的一些实验和相关的纳米谐振器的数值工作的启发，我们进行经典的分子动力学模拟，调查的热膨胀和设备的能力，作为一个应变传感器辅助热诱导振动。所提出的模型包括一个链的原子相互作用的非谐两端夹在热库。我们分析了热膨胀和谐振频率偏移作为温度和施加的应变的函数。对于横向模式，位移与应变近似呈线性关系。我们还提出了从正则计算的谐波近似分析结果表明，热膨胀是均匀的沿设备。当系统在中高温下处于非线性振荡状态时，这种预测也有效。
英文摘要：
Inspired by some recent experiments and numerical works related to nanoresonators, we perform classical molecular dynamics simulations to investigate the thermal expansion and the ability of the device to act as a strain sensor assisted by thermally-induced vibrations. The proposed model consists in a chain of atoms interacting anharmonically with both ends clamped to thermal reservoirs. We analyze the thermal expansion and resonant frequency shifts as a function of temperature and the applied strain. For the transversal modes the shift is approximately linear with strain. We also present analytical results from canonical calculations in the harmonic approximation showing that thermal expansion is uniform along the device. This prediction also works when the system operates in a nonlinear oscillation regime at moderate and high temperatures.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
