Nanofriction of 3He monolayer on superfluid 4He film

我们研究了一种超低温下的混合薄膜的纳米薄膜。通过在100 MHz的平面金衬底上进行的QCM实验，我们令人惊讶地观察到，在下面的^&lt；4&gt；He层上的^&lt；3&gt；He的一部分在0左右滑移。2 K，在v=35μm/S以上为钉扎-去钉扎机制.为了描述这一机制，提出了一种与4He流体层的超流体相变有关的可能情景.

We studied a nanofriction of a^<3> He-^<4> He mixture film at ultra low temperatures. By a QCM experiment at 100 MHz with a planar gold substrate, we observed surprisingly that a part of^<3> He on an underlying^<4> He layer slips at around 0. 2 K by a pinning-depinning mechanism above v=35μm/s. To describe the mechanism, a possible scenario related to the superfluid transition of the 4He fluid layer is suggested.