论文标题
部分可观测时空混沌系统的无模型预测
Electronic transport and thermoelectric properties of phosphorene nanodisk under an electric field
论文作者
论文摘要
Seebeck系数是确定材料热电效率的重要量。磷烯是一种具有皱纹结构的二维材料，使其性质各向异性。在这项工作中，通过紧密结合（TB）和非均衡性蔬菜功能（NEGF）方法，研究了与两个曲折磷酸烯纳米纤维相连的磷纳米虫（PDISK），在横向和跨齿端电场的情况下，研究了。我们的结果表明，结构从锯齿形色带形式变为磁盘，在结构中产生了能量差距，因此对于半径为3.1 nm的典型纳米虫，能量间隙的大小为3.88 eV。此外，随着这种变化，最大塞贝克系数从1.54增加到2.03 mV/k。此外，我们可以借助电场来控制电子传输和锯齿系数。数值结果表明，随着电场的增加，透射系数降低以及塞贝克系数的变化。垂直电场对Seebeck系数的影响比横向电场弱。对于0.3 V/nm的施加横向电场，最大塞贝克系数增强到2.09 mV/k。
The Seebeck coefficient is an important quantity in determining the thermoelectric efficiency of a material. Phosphorene is a two-dimensional material with a puckered structure, which makes its properties anisotropic. In this work, a phosphorene nanodisk (PDisk) with a radius of 3.1 nm connected to two zigzag phosphorene nanoribbons is studied, numerically, by the tight-binding (TB) and non-equilibrium Greens function (NEGF) methods in the presence of transverse and perpendicular electric fields. Our results show that the change of the structure from a zigzag ribbon form to a disk one creates an energy gap in the structure, so that for a typical nanodisk with a radius of 3.1 nm, the size of the energy gap is 3.88 eV. Besides, with this change, the maximum Seebeck coefficient increases from 1.54 to 2.03 mV/K. Furthermore, we can control the electron transmission and Seebeck coefficients with the help of the electric fields. The numerical results show that with the increase of the electric field, the transmission coefficient decreases, and the Seebeck coefficient changes. The effect of a perpendicular electric field on the Seebeck coefficient is weaker than a transverse electric field. For an applied transverse electric field of 0.3 V/nm, the maximum Seebeck coefficient enhances to 2.09 mV/K.
