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arXiv 1206.2823cond-mat.mtrl-sci
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Mn掺杂Ga-As纳米线中Mn位的EXAFS研究

The Mn site in Mn-doped Ga-As nanowires: an EXAFS study

F. d'Acapito, M. Rovezzi, F. Boscherini, F. Jabeen, G. Bais, M. Piccin, S. Rubini, F. Martelli

摘要:

我们提出了一个EXAFS研究Mn掺杂GaAs纳米线中的Mn原子环境。Mn掺杂已经通过用作纳米线生长的种子的Mn的扩散或通过在Au诱导的线的生长期间提供Mn来获得。作为一个普遍的发现,我们观察到,锰形成化学键与作为,但不纳入取代位点。在Mn诱导的GaAs线,Mn主要是发现键合到作为在一个相当无序的环境中,并与拉伸键长,让人想起所表现出的MnAs相。在Au种子纳米线,随着拉伸Mn-As的协调,我们已经发现Mn的存在下,在Mn-Au金属间化合物。

英文摘要:

We present an EXAFS study of the Mn atomic environment in Mn-doped GaAs nanowires. Mn doping has been obtained either via the diffusion of the Mn used as seed for the nanowire growth or by providing Mn during the growth of Au-induced wires. As a general finding, we observe that Mn forms chemical bonds with As but is not incorporated in a substitutional site. In Mn-induced GaAs wires, Mn is mostly found bonded to As in a rather disordered environment and with a stretched bond length, reminiscent of that exhibited by MnAs phases. In Au-seeded nanowires, along with stretched Mn-As coordination we have found the presence of Mn in a Mn-Au intermetallic compound.

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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