Title :
THz absorption bands in Sr14Cu24O41 by synchrotron radiation
Author :
Constable, Evan ; Guochu Deng ; Horvat, J. ; Lewis, R.A.
Author_Institution :
Inst. for Supercond. & Electron. Mater., Univ. of Wollongong, Wollongong, NSW, Australia
Abstract :
We use unpolarized synchrotron radiation to probe the temperature dependent transmittance of single crystal Sr14Cu24O41 in the spectral range 15-110 cm-1 (0.45-3.3 THz). At high temperature we identify a conductivity band, which we assign to hole hopping between neighboring chains. At low temperatures we identify 14 resonance bands, 11 of which are previously unreported. Analysis of the absorption band spectral weight indicates mode coupling accompanying a transition in the vicinity of 100-200 K.
Keywords :
absorption; spectral methods of temperature measurement; strontium compounds; synchrotron radiation; thermal conductivity; Sr14Cu24O41; THz absorption bands; absorption band spectral weight; conductivity band; frequency 0.45 THz to 3.3 THz; synchrotron radiation; temperature 100 K to 200 K; temperature dependent transmittance; Absorption; Couplings; Crystals; Phonons; Synchrotron radiation; Temperature dependence; Temperature measurement;
Conference_Titel :
Infrared, Millimeter, and Terahertz waves (IRMMW-THz), 2014 39th International Conference on
Conference_Location :
Tucson, AZ
DOI :
10.1109/IRMMW-THz.2014.6956359
