arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1608.08191cond-mat.mes-hallcond-mat.mtrl-sci
收藏

单层磷烯中的热电输运

Thermoelectric transport in monolayer phosphorene

Moslem Zare, Babak Zare Rameshti, Farnood G. Ghamsari, Reza Asgari

摘要:

我们应用广义玻尔兹曼理论来描述单层磷烯在短程和长程带电杂质相互作用下的热电输运性质。首先,我们提出了一个低能量的哈密顿量来探索准确的电子能带结构的磷烯与密度泛函模拟得到的结果进行比较。我们解释了导带和价带之间的耦合对热电性能的影响。我们表明,磷烯的导电性是高度各向异性的,而塞贝克系数和品质因数,而不受影响,通过存在或不存在的耦合项,几乎是各向同性的。此外,我们表明,$n$型掺杂的导电性是更多的耦合项比$p$型的影响。随着热电势符号的变化,可以实现深刻的热电效应。

英文摘要:

We apply the generalized Boltzmann theory to describe thermoelectric transport properties of monolayer phosphorene in the presence of short- and long-range charged impurity interactions. First, we propose a low-energy Hamiltonian to explore the accurate electronic band structure of phosphorene in comparison with those results obtained by density-functional simulations. We explain the effect of the coupling between the conduction and valence bands on the thermoelectric properties. We show that the electric conductivity of phosphorene is highly anisotropic, while the Seebeck coefficient and figure of merit, without being influenced via either the presence or absence of the coupling term, are nearly isotropic. Furthermore, we demonstrate that the conductivity for the $n$ type of doping is more influenced by the coupling term than that of the $p$ type. Along with thermopower sign change, profound thermoelectric effects can be achieved.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑