纳机电系统中的不连续欧拉不稳定性
Discontinuous Euler instability in nanoelectromechanical systems
摘要：
我们研究纳米机电系统附近的机械不稳定性。我们表明，相当普遍的，电子和振动自由度之间的相互作用，基本上可以准确地占不稳定性是连续的。我们应用我们的一般框架的欧拉屈曲不稳定性，并发现电子和振动自由度之间的相互作用定性地影响机械不稳定性，把它变成一个不连续的密切类似的三临界点的朗道理论的相变。
英文摘要：
We investigate nanoelectromechanical systems near mechanical instabilities. We show that quite generally, the interaction between the electronic and the vibronic degrees of freedom can be accounted for essentially exactly when the instability is continuous. We apply our general framework to the Euler buckling instability and find that the interaction between electronic and vibronic degrees of freedom qualitatively affects the mechanical instability, turning it into a discontinuous one in close analogy with tricritical points in the Landau theory of phase transitions.
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