论文标题
在分子晶体管中自旋偏振电子的隧道中的热电效应
Thermoelectric effects in tunneling of spin-polarized electrons in a molecular transistor
论文作者
论文摘要
考虑到具有温度梯度的完全自旋偏振电极的分子晶体管中的热传递。通过在小隧道宽度上使用密度矩阵方法在扰动方法中使用密度矩阵方法解决了问题。已经发现，由于振动效应，Spintronic分子晶体管的特征是负差分导电。已经证明，在热电$ s $对失调能量的依赖性中，与常规分子晶体管相比，符号的变化点和幅度的变化点增加。已经找到了最大的热电功率在最大效率下为Spintronic分子晶体管提供最高的热电功率。已经计算出了功绩$ zt $和$ p_ {me} $的依赖性对温度和外部磁场的依赖性，并且已经研究了库仑相互作用对热电学特性的影响。已经揭示了，对于非零库仑相互作用，热电设备的更方便的状态是发展的，其特征是外部磁场的连续区域，这些区域提供了高电力功率的高值。
Thermal transmission in a molecular transistor with fully spin-polarized electrodes subjected to a temperature gradient is considered. The problem has been solved by using density matrix method in perturbation approach over small tunneling width. It has been found that due to the vibronic effects spintronic molecular transistor is characterized by negative differential thermoconductance. It has been demonstrated that in the dependence of thermopower $S$ on the detuning energy there is an increased number of points of change of the sign and magnitude of $S$ comparing with that of conventional molecular transistor. Optimal parameters, that provide the highest thermoelectric power at maximum efficiency $P_{me}$ for spintronic molecular transistor, have been found. The dependences of the figure of merit $ZT$ and $P_{me}$ on temperature and an external magnetic field have been calculated and the influence of Coulomb interaction on the thermolelectric properties has been studied. It has been revealed, that for non-zero Coulomb interaction more handy regime of thermoelectric device develops, characterized by continuous region of external magnetic fields, which provide high values of thermoelectric power.
