Raman studies of local structure, superstructure, and phases in high temperature superconductors

Liarokapis, E

dc.contributor.author	Liarokapis, E	en
dc.date.accessioned	2014-03-01T01:15:51Z
dc.date.available	2014-03-01T01:15:51Z
dc.date.issued	2000	en
dc.identifier.issn	0921-4534	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/13767
dc.subject	Characteristic Variety	en
dc.subject	High Hydrostatic Pressure	en
dc.subject	High Temperature Superconductor	en
dc.subject	Local Structure	en
dc.subject	Low Temperature	en
dc.subject	Raman Spectra	en
dc.subject	Raman Spectroscopy	en
dc.subject	Phase Transition	en
dc.subject.classification	Physics, Applied	en
dc.subject.other	YBA2CU3OX	en
dc.title	Raman studies of local structure, superstructure, and phases in high temperature superconductors	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/S0921-4534(00)01264-8	en
heal.identifier.secondary	http://dx.doi.org/10.1016/S0921-4534(00)01264-8	en
heal.language	English	en
heal.publicationDate	2000	en
heal.abstract	Raman spectroscopy is ideal for probing the local structure of a compound of the order of a few unit cells, providing important information for small structural modifications, superstructures, and phase transitions. The high T-c materials show a characteristic variety of phases, which may play an important role in the mechanism of superconductivity. Among the high T-c materials the YBCO and the LSCO compounds, which can be prepared in high purity, show a variety of doping induced phase transitions. In YBCO, the replacement of Y by Ca in a very controllable way of oxygenation can extend the doping level well above the optimum value allowing the comparison with other superconducting materials. From the careful examination of the changes induced in the Raman spectra at low temperatures, high hydrostatic pressures, and various oxygen concentrations and doping levels, the formation of phases and superstructures in the YBCO series will be examined. The Raman studies of the yttrium series will be compared with similar investigations on LSCO and the other superconducting materials. The information obtained from this analysis about the formation of phases and the slight modifications in the local structure of the high temperature superconductors will be compared with other measurements.	en
heal.publisher	ELSEVIER SCIENCE BV	en
heal.journalName	PHYSICA C	en
dc.identifier.doi	10.1016/S0921-4534(00)01264-8	en
dc.identifier.isi	ISI:000165856000046	en
dc.identifier.volume	341	en
dc.identifier.spage	2185	en
dc.identifier.epage	2188	en