Short range atomic migration in amorphous silicon

Short range atomic migration in amorphous silicon
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非晶硅中的短程原子迁移

DOI:
10.1063/1.4948333
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发表时间:
2016
影响因子:
3.2
通讯作者:
H. Schmidt
H. Schmidt
中科院分区:
物理与天体物理3区
文献类型:
--
作者:
F. Strauß;B. Jerliu;T. Geue;J. Stahn;H. Schmidt

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Experiments on self-diffusion in amorphous silicon between 400 and 500 °C are presented, which were carried out by neutron reflectometry in combination with {sup 29}Si/{sup nat}Si isotope multilayers. Short range diffusion is detected on a length scale of about 2 nm, while long range diffusion is absent. Diffusivities are in the order of 10{sup −19}–10{sup −20} m{sup 2}/s and decrease with increasing annealing time, reaching an undetectable low value for long annealing times. This behavior is strongly correlated to structural relaxation and can be explained as a result of point defect annihilation. Diffusivities for short annealing times of 60 s follow the Arrhenius law with an activation enthalpy of (0.74 ± 0.21) eV, which is interpreted as the activation enthalpy of Si migration.
非晶硅中空位的证据。
DOI: 10.1103/physrevlett.68.3714
发表时间: 1992
影响因子: 8.6
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van den Hoven GN;Liang;Niesen;Custer
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DOI: 10.1103/physrevlett.116.025901
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发表时间: 1973-01-01
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期刊:
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