76 citations · 212 across the 6 of their papers we have counts for
6 papers
Thermoelectric power factor under strain-induced band-alignment in the half-Heuslers NbCoSn and TiCoSb
Chathurangi Kumarasinghe, Neophytos Neophytou
Band convergence is an effective strategy to improve the thermoelectric performance of complex bandstructure thermoelectric materials. Half-Heuslers are good candidates for band co…
Material Descriptors for the Discovery of Efficient Thermoelectrics
Patrizio Graziosi, Chathurangi Kumarasinghe, Neophytos Neophytou
The predictive performance screening of novel compounds can significantly promote the discovery of efficient, cheap, and non-toxic thermoelectric materials. Large efforts to implem…
Impact of the scattering physics on the power factor of complex thermoelectric materials
Patrizio Graziosi, Chathurangi Kumarasinghe, Neophytos Neophytou
We assess the impact of the scattering physics assumptions on the thermoelectric properties of five Co-based p-type half-Heusler alloys by considering full energy-dependent scatter…
DFT study of undoped and As-doped Si nanowires approaching the bulk limit
Chathurangi Kumarasinghe, David R. Bowler
The electronic properties of pure and As-doped Si nanowires with radii up to 9.53 nm are studied using large scale density functional theory (DFT) calculations. We show that, for t…
Band alignment and scattering considerations for enhancing the thermoelectric power factor of complex materials: The case of Co-based half-Heuslers
Chathurangi Kumarasinghe, Neophytos Neophytou
Half-Heuslers, an emerging thermoelectric material group, has complex bandstructures with multiple bands that can be aligned through band engineering approaches, giving us an oppor…
Structural properties of Silicon-Germanium and Germanium-Silicon Core-Shell Nanowires
Conn O'Rourke, Shereif Y. Mujahed, Chathurangi Kumarasinghe +2
Core-shell nanowires made of Si and Ge can be grown experimentally with excellent control for different sizes of both core and shell. We have studied the structural properties of S…