Thermoelectric properties of atomic-thin silicene and germanene nano-structures

Abstract

The thermoelectric properties in one- and two-dimensional silicon and germanium structures have been investigated using first-principle density functional techniques and linear response for the thermal and electrical transport. We have considered here the two-dimensional silicene and germanene, together with nano-ribbons of different widths. For the nano-ribbons, we have also investigated the possibility of nano-structuring these systems by mixing silicon and germanium. We found that the figure of merit at room temperature of these systems is remarkably high, up to 2.5.

15 pages, 18 figures, revtex4-1

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• Highly Anistoropic Thermal Conductivity of Arsenene: An ab initio Study
• Current developments in silicene and germanene
• Thermoelectric properties of orthorhombic group IV-VI monolayers from the first-principles calculations
• Bilayer SnS${}_2$: Easy-tunable Stacking Sequence by Charging and Loading Pressure
• Introduction to the Physics of Silicene and other 2D Materials
• Spin-orbital coupling effect on power factor in semiconducting transition-metal dichalcogenide monolayers
• Optimal band gap for improved thermoelectric performance of two-dimensional Dirac materials
• Edge magnetism impact on electrical conductance and thermoelectric properties of graphenelike nanoribbons
• Properties of BSi${}_6$N monolayers derived by first-principle computation
• Zigzag nanoribbons of two-dimensional hexagonal crystals: magnetic, topological and thermoelectric properties
• Phononic thermal conductivity in silicene: the role of vacancy defects and boundary scattering
• High intrinsic $ZT$ in InP${}_3$ monolayer at room temperature
• A relaxation time model for efficient and accurate prediction of lattice thermal conductivity
• Phonon-Driven Electron Scattering and Magnetothermoelectric Effect in Two-Dimensional Tin Selenide
• A general formulation for the magnetic oscillations in two dimensional systems
• Impressive optoelectronic and thermoelectric properties of two-dimensional XI${}_2$ (X=Sn, Si): a first principle study