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arXiv 1002.0793cond-mat.mtrl-scicond-mat.str-el
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石墨烯上化学吸附氢附近的电子俘获

Trapping of electrons near chemisorbed hydrogen on graphene

J. A. Verges, P. L. de Andres

摘要:

用从头计算密度泛函理论研究了氢原子在带负电荷的单层石墨烯片上的化学吸附。我们已经模拟了有限的集群和无限的周期性系统,以调查不同成分的理论,例如交换和相关电位,基组等的效果。氢的电子亲和力占主导地位的带电系统中的能量平衡和额外的电子主要是吸引到附近的区域的化学吸附原子。主要后果是:(i)未成对自旋的抵消导致单重基态,以及(ii)氢与石墨烯片之间的更强相互作用。

英文摘要:

Chemical adsorption of atomic hydrogen on a negatively charged single layer graphene sheet has been analyzed with ab-initio Density Functional Theory calculations. We have simulated both finite clusters and infinite periodic systems to investigate the effect of different ingredients of the theory, e.g. exchange and correlation potentials, basis sets, etc. Hydrogen's electron affinity dominates the energetic balance in the charged systems and the extra electron is predominantly attracted to a region nearby the chemisorbed atom. The main consequences are: (i) the cancellation of the unpaired spin resulting in a singlet ground-state, and (ii) a stronger interaction between hydrogen and the graphene sheet.

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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