Professor Buddhika Mendis' Outputs (6)

Coherent electron Compton scattering and the non-diagonal electron momentum density of solids (2022)
Journal Article
Mendis, B. (2023). Coherent electron Compton scattering and the non-diagonal electron momentum density of solids. Ultramicroscopy, 245, https://doi.org/10.1016/j.ultramic.2022.113664

Experimental techniques that probe the electronic structure of crystalline solids are vital for exploring novel condensed matter phenomena. In coherent Compton scattering the Compton signal due to interference of an incident and Bragg diffracted beam... Read More about Coherent electron Compton scattering and the non-diagonal electron momentum density of solids.

Towards Electron Energy Loss Compton Spectra Free From Dynamical Diffraction Artifacts (2022)
Journal Article
Mendis, B. G., & Talmantaite, A. (2022). Towards Electron Energy Loss Compton Spectra Free From Dynamical Diffraction Artifacts. Microscopy and Microanalysis, 28(6), 1971–1980. https://doi.org/10.1017/s1431927622012223

The Compton signal in electron energy loss spectroscopy (EELS) is used to determine the projected electron momentum density of states for the solid. A frequent limitation however is the strong dynamical scattering of the incident electron beam within... Read More about Towards Electron Energy Loss Compton Spectra Free From Dynamical Diffraction Artifacts.

Structure and electronic properties of domain walls and stacking fault defects in prospective photoferroic materials bournonite and enargite (2022)
Journal Article
Rigby, O., Richards-Hlabangana, T., Ramasse, Q., MacLaren, I., Lomas-Zapata, R., Rumsey, M., McKenna, K., & Mendis, B. (2022). Structure and electronic properties of domain walls and stacking fault defects in prospective photoferroic materials bournonite and enargite. Journal of Applied Physics, 132(18), Article 185001. https://doi.org/10.1063/5.0095091

Bournonite (CuPbSbS3) and enargite (Cu3AsS4) have recently been used as absorber layers in thin-film photovoltaic devices due to their ideal bandgap and ferroelectric properties. An understanding of the ferroelectric domain structure in these materia... Read More about Structure and electronic properties of domain walls and stacking fault defects in prospective photoferroic materials bournonite and enargite.

Background subtraction in electron Compton spectroscopy (2022)
Journal Article
Mendis, B. (2022). Background subtraction in electron Compton spectroscopy. Micron, 163, Article 103363. https://doi.org/10.1016/j.micron.2022.103363

Compton scattering in electron energy loss spectroscopy (EELS) is used to quantify the momentum distribution of occupied electronic states in a solid. The Compton signal is a broad feature with a width of several hundred eV. Furthermore, the weak int... Read More about Background subtraction in electron Compton spectroscopy.

Quantum theory of magnon excitation by high energy electron beams (2022)
Journal Article
Mendis, B. (2022). Quantum theory of magnon excitation by high energy electron beams. Ultramicroscopy, 239, Article 113548. https://doi.org/10.1016/j.ultramic.2022.113548

The role of magnon inelastic scattering in high energy electron diffraction of spin unpolarised electron beams, including vortex beams, is investigated theoretically for a Heisenberg ferromagnet. The interaction is between the atomic magnetic dipoles... Read More about Quantum theory of magnon excitation by high energy electron beams.

Selenium passivates grain boundaries in alloyed CdTe solar cells (2022)
Journal Article
Fiducia, T., Howkins, A., Abbas, A., Mendis, B., Munshi, A., Barth, K., Sampath, W., & Walls, J. (2022). Selenium passivates grain boundaries in alloyed CdTe solar cells. Solar Energy Materials and Solar Cells, 238, Article 111595. https://doi.org/10.1016/j.solmat.2022.111595

Cadmium telluride (CdTe) solar cells have achieved efficiencies of over 22%, despite having absorber layer grain sizes less than 10 μm and hence a very high density of grain boundaries. Recent research has shown that this is possible because of parti... Read More about Selenium passivates grain boundaries in alloyed CdTe solar cells.