Density of states features in some anomalous melting elements
2013 (English)In: Journal of Physics: Condensed Matter, ISSN 0953-8984, E-ISSN 1361-648X, Vol. 25, no 46, 465107- p.Article in journal (Refereed) Published
Valence band photoemission measurements have been made on crystalline and supercooled liquid gallium, and across the liquid and solid phases of bismuth and indium. Measurements are angle integrated and made using photon excitations of 21.21 and 40.81 eV. In all cases the Bloch states are destroyed upon melting and the free electron gas is constrained by a charge-neutral liquid. The spectra of indium show little change upon solidification, indicating a common electronic structure for crystalline and liquid phases. In contrast, the energy distribution curves for supercooled gallium and bismuth show large changes in the electronic structure from solid to liquid phases, giving rise to the formation of pseudogaps in the density of states at the Fermi energy, E-F. Observations of this kind enable us to distinguish normal or anomalous melting from photoemission measurements.
Place, publisher, year, edition, pages
2013. Vol. 25, no 46, 465107- p.
IdentifiersURN: urn:nbn:se:uu:diva-212310DOI: 10.1088/0953-8984/25/46/465107ISI: 000326674700008OAI: oai:DiVA.org:uu-212310DiVA: diva2:677697