Dielectric environment effect on carrier mobility of graphene double-layer structure
Dielectric environment effect on carrier mobility of graphene double-layer structure
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DOI：
10.1063/1.4813821
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发表时间：
2013-07
影响因子：
4
通讯作者：
K. Hosono;K. Wakabayashi
中科院分区：
文献类型：
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作者：
K. Hosono;K. Wakabayashi
基于玻耳兹曼输运理论，从理论上研究了介电环境对石墨烯双层结构(GDLS)载流子迁移率的影响。在该系统中，两层石墨烯由介质阻挡层隔开。指出当层间距大于费米波矢量的倒数时，载流子迁移率强烈依赖于势垒层的介电常数。此外，还评估了改善GDLS带电杂质限制载流子迁移率的条件。
We have theoretically studied the dielectric environment effect on the charged-impurity-limited carrier mobility of graphene double-layer structure (GDLS) on the basis of the Boltzmann transport theory. In this system, two graphene layers are separated by a dielectric barrier layer. It is pointed out that the carrier mobility strongly depends on the dielectric constant of the barrier layer when the interlayer distance becomes larger than the inverse of the Fermi wave vector. Moreover, the conditions to improve the charged-impurity-limited carrier mobility of the GDLS are evaluated.