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  Journal of Spectroscopy and Dynamics 2012, 2: 18
  Research Article
 
Terahertz spectroscopic investigations of low energy dynamics in pulsed laser deposited manganite thin films
  Rakesh Ranaa, Parul Pandeya, Shivendra Tripathia, D. S. Ranaa, Nilesh Awarib, Abhishek Singhb, S. S. Prabhub  
     
a Indian Institute of Science Education and Research (IISER) Bhopal, M. P. - 462023, India
b Tata Institute of Fundamental Research, Colaba, Mumbai – 400005, India

   
  Abstract  
  Terahertz (THz) spectroscopy and imaging are among the indispensible tools of characterization in the materials, physical, chemical and biological sciences. Among various techniques, THz time domain spectroscopy (TDS) is a promising tool to investigate low energy charge dynamics in strongly correlated systems. In this paper, we show that the epitaxial thin films synthesized by pulsed laser deposition possess a desirable structural form for the implementation of THz TDS technique. By studying the epitaxial thin films of Nd0.5Sr0.5MnO3 and Eu0.5Sr0.5MnO3 manganites, we show that the collective excitations of charge-density waves emerge in charge-ordered films whereas Drude-like conductivity appears in the metallic films.
     
  Keywords  
  Terahertz spectroscopy; Manganite; Pulsed laser deposition; Thin films  
     
   
   
   
   
     

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