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arXiv 2007.05805cond-mat.mtrl-scicond-mat.mes-hallphysics.app-ph
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插层导致化学掺杂MoS_{2}摩擦的反层依赖性

Intercalation Leads to Inverse Layer Dependence of Friction on Chemically Doped MoS_{2}

Ogulcan Acikgoz, Enrique Guerrero, Alper Yanilmaz, Omur E. Dagdeviren, Cem Çelebi, David A. Strubbe, Mehmet Z. Baykara

摘要:

我们目前的结果,原子力显微镜为基础的摩擦测量稀土掺杂二硫化钼(MoS2)。与二维(2D)材料上随着层数增加而减小摩擦的广泛观察形成鲜明对比,Re掺杂的MoS2上的摩擦表现出异常,即,与层数成反比。拉曼光谱测量结合从头计算揭示了Re嵌入的签名。计算表明,平面外刚度的增加与层的数量呈负相关,这是这一显着观察背后的物理机制,揭示了2D材料独特的起皱机制。

英文摘要:

We present results of atomic-force-microscopy-based friction measurements on Re-doped molybdenum disulfide (MoS2). In stark contrast to the widespread observation of decreasing friction with increasing number of layers on two-dimensional (2D) materials, friction on Re-doped MoS2 exhibits an anomalous, i.e., inverse dependence on the number of layers. Raman spectroscopy measurements combined with ab initio calculations reveal signatures of Re intercalation. Calculations suggest an increase in out-of-plane stiffness that inversely correlates with the number of layers as the physical mechanism behind this remarkable observation, revealing a distinctive regime of puckering for 2D materials.

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。

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