Ab Initio Transport Calculations for Functionalized Graphene Flakes on a Supercomputer
Ab Initio Transport Calculations for Functionalized Graphene Flakes on a Supercomputer
复制标题
超级计算机上功能化石墨烯薄片的从头算输运计算
DOI:
10.1007/978-3-319-24633-8_9
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发表时间:
2016
期刊:
影响因子:
--
通讯作者:
I. Kondov
中科院分区:
文献类型:
--
作者:
M. Walz;A. Bagrets;F. Evers;I. Kondov
We present ab initio transport studies of large graphene flakes focusing on the local current densityj(r) as it arises from a dc-transport measurement. Such ab initio transport calculations for sufficiently large flakes can be successfully tackled only using well scaling ab initio packages capable for transport calculations in thin film geometries. We employ theFHI-aims/AitransSpackages to study the effect of disorder on the local current density in graphene flakes, in particular, the effect of chemical functionalization on mesoscopic fluctuations of the current density. Simulating graphene flakes with several thousands of atoms, we clearly see the qualitative effects of quantum interference and mesoscopic fluctuations in such systems. We also discuss the parallelization and optimization techniques, which we implemented into the transport moduleAitransSto allow efficient ab initio transport calculation on Cray XE6 and XC40 supercomputers.
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影响因子:
8.6
作者:
M. Walz;J.Wilhelm;F. Evers
通讯作者:
F. Evers
影响因子:
5.5
作者:
M. Walz;A. Bagrets;F. Evers
通讯作者:
F. Evers
DOI:
--
发表时间:
--
期刊:
--
影响因子:
--
作者:
A. Marek;V. Blum;R. Johanni;V. Havu;Bruno Lang;T. Auckenthaler;A. Heinecke;H. Bungartz;H. Lederer
通讯作者:
A. Marek;V. Blum;R. Johanni;V. Havu;Bruno Lang;T. Auckenthaler;A. Heinecke;H. Bungartz;H. Lederer
影响因子:
3.7
作者:
J. Wilhelm;M. Walz;F. Evers
通讯作者:
F. Evers
影响因子:
4.4
作者:
Arnold, A.;Weigend, F.;Evers, F.
通讯作者:
Evers, F.