کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1593796 | 1515677 | 2009 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Influence of metal contacts and charge inhomogeneity on transport properties of graphene near the neutrality point
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
دانش مواد (عمومی)
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چکیده انگلیسی
There is an increasing amount of literature concerning electronic properties of graphene close to the neutrality point. Many experiments continue using the two-probe geometry or invasive contacts or do not control samples’ macroscopic homogeneity. We believe that it is helpful to point out some problems related to such measurements. By using experimental examples, we illustrate that the charge inhomogeneity induced by spurious chemical doping or metal contacts can lead to large systematic errors in assessing graphene’s transport properties and, in particular, its minimal conductivity. The problems are most severe in the case of two-probe measurements where the contact resistance is found to strongly vary as a function of gate voltage.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solid State Communications - Volume 149, Issues 27–28, July 2009, Pages 1068–1071
Journal: Solid State Communications - Volume 149, Issues 27–28, July 2009, Pages 1068–1071
نویسندگان
P. Blake, R. Yang, S.V. Morozov, F. Schedin, L.A. Ponomarenko, A.A. Zhukov, R.R. Nair, I.V. Grigorieva, K.S. Novoselov, A.K. Geim,