Anisotropic Thermoelectric Response in Two-Dimensional Puckered Structures

详细信息    查看全文

• 作者：Leonardo Medrano Sandonas ; David Teich ; Rafael Gutierrez ; Tommy Lorenz ; Alessandro Pecchia ; Gotthard Seifert ; Gianaurelio Cuniberti
• 刊名：Journal of Physical Chemistry C
• 出版年：2016
• 出版时间：August 25, 2016
• 年：2016
• 卷：120
• 期：33
• 页码：18841-18849
• 全文大小：641K
• 年卷期：0
• ISSN：1932-7455

文摘

Two-dimensional semiconductor materials with puckered structure offer a novel playground to implement nanoscale thermoelectric, electronic, and optoelectronic devices with improved functionality. Using a combination of approaches to compute the electronic and phonon band structures with Green’s function based transport techniques, we address the thermoelectric performance of phosphorene, arsenene, and SnS monolayers. In particular, we study the influence of anisotropy in the electronic and phononic transport properties and its impact on the thermoelectric figure of merit ZT. Our results show no strong electronic anisotropy, but a strong thermal one, the effect being most pronounced in the case of SnS monolayers. This material also displays the largest figure of merit at room temperature for both transport directions, zigzag (ZT ∼ 0.95) and armchair (ZT ∼ 1.6), thus hinting at the high potential of these new materials in thermoelectric applications.