应力涨落法是一种研究材料力学性质的有效方法.采用应力涨落法和一种解析方法计算超低温纳米膜的局域弹性常数并分别以Lennard-Jones；(L-J)势和紧束缚势二阶矩(TB-SMA)近似为例,比较了两体势与多体势模型的不同.两种方法的结果都表明膜表面软于内部,而多体势(TB-SMA)模型膜中的次外层是最硬的.对比不同温度下应力涨落方法得到的结果,发现随着温度的升高两种势模型的纳米膜都会变软.
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