Faculty of Planaltina, University of Brasilia, Brasilia, 73345-010, Brazil.
International Center for Condensed Matter Physics, University of Brasilia, Brasilia, 70910-900, Brazil.
J Mol Model. 2019 Mar 28;25(4):102. doi: 10.1007/s00894-019-3972-0.
We investigated the dynamics of an electron subjected to a uniform electric field in the scope of a tight-binding electron-phonon interacting approach. We aimed at describing the transport in a one-dimensional lattice in which the on-site energies are distributed according to a Fibonacci sequence. Within this physical picture, we obtained a novel dynamical process with no counterpart in ordered lattices. Our findings showed that in low-disorder limit, the electron performs spatial Bloch oscillations, generating, in the turning points of its trajectory, composite quasi-particles-namely, polarons. When it comes to highly disordered systems, two strongly localized polarons are formed in the region where the oscillating charge is confined, thus propagating excitations that are present in the lattice.
我们在紧束缚电子-声子相互作用的方法范围内研究了在均匀电场中运动的电子的动力学。我们旨在描述一维晶格中的输运，其中局域能根据 Fibonacci 序列分布。在这种物理图像中，我们得到了一个新的动力学过程，在有序晶格中没有对应的过程。我们的发现表明，在低无序极限下，电子表现出空间布洛赫振荡，在其轨迹的转折点处产生复合准粒子，即极化子。当涉及到高度无序的系统时，两个强局域极化子在振荡电荷被限制的区域中形成，从而传播晶格中存在的激发。
