dc.contributor.author | Wachter, J. B. | en |
dc.contributor.author | Chrissafis, K. | en |
dc.contributor.author | Petkov, V. | en |
dc.contributor.author | Malliakas, C. D. | en |
dc.contributor.author | Bilc, D. I. | en |
dc.contributor.author | Kyratsi, Theodora | en |
dc.contributor.author | Paraskevopoulos, K. M. | en |
dc.contributor.author | Mahanti, S. D. | en |
dc.contributor.author | Torbrügge, T. | en |
dc.contributor.author | Eckert, H. | en |
dc.contributor.author | Kanatzidis, M. G. | en |
dc.creator | Wachter, J. B. | en |
dc.creator | Chrissafis, K. | en |
dc.creator | Petkov, V. | en |
dc.creator | Malliakas, C. D. | en |
dc.creator | Bilc, D. I. | en |
dc.creator | Kyratsi, Theodora | en |
dc.creator | Paraskevopoulos, K. M. | en |
dc.creator | Mahanti, S. D. | en |
dc.creator | Torbrügge, T. | en |
dc.creator | Eckert, H. | en |
dc.creator | Kanatzidis, M. G. | en |
dc.date.accessioned | 2019-05-06T12:24:49Z | |
dc.date.available | 2019-05-06T12:24:49Z | |
dc.date.issued | 2007 | |
dc.identifier.uri | http://gnosis.library.ucy.ac.cy/handle/7/48932 | |
dc.description.abstract | KSb5S8 and its solid solution analogs with Rb and Tl were found to exhibit a reversible and tunable glass→crystal→glass phase transition. Selected members of this series were analyzed by differential scanning calorimetry to measure the effect of the substitution on the thermal properties. The solid solutions K1-xRbxSb5S8 exhibited clear deviations in melting and crystallization behavior and temperatures from the parent structure. The crystallization process of the glassy KSb5S8 as a function of temperature could clearly be followed with Raman spectroscopy. The thermal conductivity of both glassy and crystalline KSb5S8 at room temperature is ∼0.40 W/m K, among the lowest known values for any dense solid-state material. Electronic band structure calculations carried out on KSb5S8 and TlSb5S8 show the presence of large indirect band-gaps and confirm the coexistence of covalent Sb-S bonding and predominantly ionic K(Tl)⋯S bonding. Pair distribution function analyses based on total X-ray scattering data on both crystalline and glassy K1-xRbxSb5S8 showed that the basic structure-defining unit is the same and it involves a distorted polyhedron of "SbS7" fragment of ∼7 Å diameter. The similarity of local structure between the glassy and crystalline phases accounts for the facile crystallization rate in this system. © 2006 Elsevier Inc. All rights reserved. | en |
dc.language.iso | eng | en |
dc.source | Journal of Solid State Chemistry | en |
dc.subject | Crystallization | en |
dc.subject | Thermal conductivity | en |
dc.subject | Glass | en |
dc.subject | Raman spectroscopy | en |
dc.subject | Potassium compounds | en |
dc.subject | Differential scanning calorimetry | en |
dc.subject | Phase transitions | en |
dc.subject | Thermodynamic properties | en |
dc.subject | Electronic band structure calculations | en |
dc.subject | Glasses | en |
dc.subject | Non volatile memory | en |
dc.subject | Non-volatile memory | en |
dc.subject | Pair distribution function analyses | en |
dc.subject | Phase change behavior | en |
dc.title | Local structure and influence of bonding on the phase-change behavior of the chalcogenide compounds K1-xRbxSb5S8 | en |
dc.type | info:eu-repo/semantics/article | |
dc.identifier.doi | 10.1016/j.jssc.2006.10.027 | |
dc.description.volume | 180 | |
dc.description.startingpage | 420 | |
dc.description.endingpage | 431 | |
dc.author.faculty | Πολυτεχνική Σχολή / Faculty of Engineering | |
dc.author.department | Τμήμα Μηχανικών Μηχανολογίας και Κατασκευαστικής / Department of Mechanical and Manufacturing Engineering | |
dc.type.uhtype | Article | en |
dc.contributor.orcid | Kyratsi, Theodora [0000-0003-2916-1708] | |
dc.description.totalnumpages | 420-431 | |
dc.gnosis.orcid | 0000-0003-2916-1708 | |