Hopping Conduction in Mn Ion-Implanted GaAs Nanowires
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- 作者：Waldomiro Paschoal ; Jr. ; Sandeep Kumar ; Christian Borschel ; Phillip Wu ; Carlo M. Canali ; Carsten Ronning ; Lars Samuelson ; H氓kan Pettersson
- 刊名：Nano Letters
- 出版年：2012
- 出版时间：September 12, 2012
- 年：2012
- 卷：12
- 期：9
- 页码：4838-4842
- 全文大小：257K
- 年卷期：v.12,no.9(September 12, 2012)
- ISSN：1530-6992
文摘
We report on temperature-dependent charge transport in heavily doped Mn+-implanted GaAs nanowires. The results clearly demonstrate that the transport is governed by temperature-dependent hopping processes, with a crossover between nearest neighbor hopping and Mott variable range hopping at about 180 K. From detailed analysis, we have extracted characteristic hopping energies and corresponding hopping lengths. At low temperatures, a strongly nonlinear conductivity is observed which reflects a modified hopping process driven by the high electric field at large bias.