Hopping electron model with geometrical frustration: kinetic Monte Carlo simulations
Hopping electron model with geometrical frustration: kinetic Monte Carlo simulations
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DOI：
10.1140/epjb/e2016-70141-4
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发表时间：
2016-10
期刊：
影响因子：
--
通讯作者：
T. Terao
中科院分区：
文献类型：
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作者：
T. Terao
用动力学蒙特卡罗方法研究了Kagome晶格上电子跳跃模型，并研究了系统的非平衡性质。我们已经在数值上证实了老化现象存在于Kagome晶格上的电子系统的自相关函数\hbox{} Ct，tW）（，这是一个没有任何无序的几何阻挫晶格。本文还研究了Kagome晶格上跳跃电子的等待时间分布.证实了在较低温度下获得的\hbox{}p τ）的分布服从幂律行为，这是电子连续时间无规行走的特征。这些功能也进行了比较的库仑玻璃模型，作为一个模型的无序薄膜和掺杂半导体的特性。这项工作代表了一个进步的几何挫折系统的动力学的理解，并将作为这些物理系统的进一步研究的基础。
The hopping electron model on the Kagome lattice was investigated by kinetic Monte Carlo simulations, and the non-equilibrium nature of the system was studied. We have numerically confirmed that aging phenomena are present in the autocorrelation function \hbox{}C t,tW)( of the electron system on the Kagome lattice, which is a geometrically frustrated lattice without any disorder. The waiting-time distributions \hbox{}pτ)( of hopping electrons of the system on Kagome lattice has been also studied. It is confirmed that the profile of \hbox{}p τ)( obtained at lower temperatures obeys the power-law behavior, which is a characteristic feature of continuous time random walk of electrons. These features were also compared with the characteristics of the Coulomb glass model, used as a model of disordered thin films and doped semiconductors. This work represents an advance in the understanding of the dynamics of geometrically frustrated systems and will serve as a basis for further studies of these physical systems.