Please use this identifier to cite or link to this item: https://libjncir.jncasr.ac.in/xmlui/handle/10572/2314
Full metadata record
DC FieldValueLanguage
dc.contributor.authorKavitha, C.
dc.contributor.authorNarayana, Chandrabhas
dc.date.accessioned2017-02-16T11:32:48Z-
dc.date.available2017-02-16T11:32:48Z-
dc.date.issued2014
dc.identifier.citationKavitha, C; Narayana, C, Temperature-induced electron-phonon coupling behaviour of AgGaS2 probed by Brillouin spectroscopy. Solid State Communications 2014, 195, 10-15, http://dx.doi.org/10.1016/j.ssc.2014.06.005en_US
dc.identifier.citationSolid State Communicationsen_US
dc.identifier.citation195en_US
dc.identifier.issn0038-1098
dc.identifier.urihttps://libjncir.jncasr.ac.in/xmlui/10572/2314-
dc.descriptionRestricted Accessen_US
dc.description.abstractLow temperature Brillouin scattering studies on Chalcopyrite AgGaS2 have been carried out between the temperatures ranges 20-300 K. We observe the Brillouin modes for AgGaS2 as follows: for crossed polarization (VH) the two modes are around 5.4 and 18 GHz, labelled as RSW1 (Rayleigh surface mode), LA (longitudinal) modes and for parallel polarization (HH), we see the modes are around 4.5 and 11 GHz, labelled as RSW2, TA (transverse acoustic). According to this acoustic phonon mode behaviour with temperature, we do see phase transition at 80 K for AgGaS2. The phase change observed at 80 K is attributed to a strong electron-phonon coupling between the acoustic modes, which modulates the acoustic mode frequency 10-15%. The strong electron-phonon coupling between acoustic modes (LA and TA), which is seen from the anomalous behaviour below 80 K. shows the electronic transition to be of the type direct to indirect band gap. The sound velocity and elastic constants have been calculated using Brillouin modes, which are in good agreement with previous reports. (C) 2014 Elsevier Ltd. All rights reserved.en_US
dc.description.uri1879-2766en_US
dc.description.urihttp://dx.doi.org/10.1016/j.ssc.2014.06.005en_US
dc.languageEnglishen
dc.language.isoEnglishen_US
dc.publisherPergamon-Elsevier Science Ltden_US
dc.rights@Pergamon-Elsevier Science Ltd, 2014en_US
dc.subjectCondensed Matter Physicsen_US
dc.subjectAggas2en_US
dc.subjectCrystal Growthen_US
dc.subjectChalcopyriteen_US
dc.subjectNonlinear Optical Propertyen_US
dc.subjectBrillouin Spectroscopyen_US
dc.subjectSilver Thiogallate Aggas2en_US
dc.subjectX-Rayen_US
dc.subjectThermal-Expansionen_US
dc.subjectDependenceen_US
dc.subjectSemiconductorsen_US
dc.subjectScatteringen_US
dc.titleTemperature-induced electron-phonon coupling behaviour of AgGaS2 probed by Brillouin spectroscopyen_US
dc.typeArticleen_US
Appears in Collections:Research Articles (Chandrabhas N.)

Files in This Item:
File Description SizeFormat 
266.pdf
  Restricted Access
821.93 kBAdobe PDFView/Open Request a copy


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.