Efficient computation of Kubo conductivity for incommensurate 2D heterostructures
Efficient computation of Kubo conductivity for incommensurate 2D heterostructures
复制标题
有效计算不相称二维异质结构的 Kubo 电导率
DOI:
10.1140/epjb/e2020-100518-7
复制
发表时间:
2020
期刊:
影响因子:
--
通讯作者:
Luskin, Mitchell
中科院分区:
文献类型:
--
作者:
Massatt, Daniel;Carr, Stephen;Luskin, Mitchell
AbstractWe introduce a numerical method for computing conductivity via the Kubo formula for incommensurate 2D bilayer heterostructures using a tight-binding framework. We begin by deriving the momentum space formulation and Kubo formula from the real space tight-binding model using the appropriate Bloch transformation operator. We further discuss the resulting algorithm along with its convergence rate and computational cost in terms of model parameters such as relaxation time and temperature. In particular, we show that for low frequencies, low temperature, and long relaxation times conductivity can be computed very efficiently using the momentum space algorithm for a wide class of materials. We then showcase our method by computing conductivity for twisted bilayer graphene (tBLG) for small twist angles.Graphical abstract
影响因子:
41.2
作者:
Yoo, Hyobin;Engelke, Rebecca;Kim, Philip
通讯作者:
Kim, Philip
影响因子:
3.7
作者:
Carr, Stephen;Massatt, Daniel;Kaxiras, Efthimios
通讯作者:
Kaxiras, Efthimios
影响因子:
2.5
作者:
Cazeaux, Paul;Luskin, Mitchell;Massatt, Daniel
通讯作者:
Massatt, Daniel