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氮原子在钨低指数表面上的吸附和振动

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Indexed by: Journal Article

Date of Publication: 2008-11-20

Journal: 辽宁化工

Volume: 37

Issue: 11

Page Number: 748-751,770

ISSN: 1004-0935

Key Words: N-W表面体系 5-MP势 表面吸附 低指数面

Abstract: 应用原子和表面簇合物相互作用的5参数Morse势法(5-MP)对N-W低指数表面体系进行了研究,并获得了全部临界点特性以及3个面的势能面.计算结果表明:在低覆盖度下,N原子优先吸附在W(100)面的四重洞位H,获得62 meV的垂直振动频率;在W(110)面上只存在三重洞位H3的稳定吸附态,垂直振动频率为43 meV;在W(111)面上最稳定的吸附位为赝式三重位H3,垂直振动频率为79 meV.

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