Terahertz conductivity of ultra high electron concentration 2DEGs in NTO/STO heterostructures

Sara Arezoomandan, Hugo O. Condori Quispe, Ashish Chanana, Peng Xu, Ajay Nahata, Bharat Jalan, Berardi Sensale-Rodriguez

Research output: Chapter in Book/Report/Conference proceedingConference contribution


We analyze the terahertz properties of complex oxide hetero-structures with record-high carrier concentration approaching 1015 cm-2. Our results evidence a large room temperature terahertz conductivity, which corresponds to 3X to 6X larger mobility than what is extracted from electrical measurements. That is, in spite of a relatively lower mobility, when taking into account its ultra-large carrier concentration, the 2DEG in complex oxide hetero-structures can still attain a large terahertz conductivity, which is comparable with that in traditional high-mobility semiconductors or large-area CVVD graphene films. Moreover, we also discuss the perspectives off these hetero-structures for terahertz and high frequency electronic applications.

Original languageEnglish (US)
Title of host publicationTerahertz Emitters, Receivers, and Applications VII
EditorsManijeh Razeghi, Alexei N. Baranov, John M. Zavada, Dimitris Pavlidis
ISBN (Electronic)9781510602595
StatePublished - Jan 1 2016
EventTerahertz Emitters, Receivers, and Applications VII - San Diego, United States
Duration: Aug 28 2016Aug 31 2016

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X


ConferenceTerahertz Emitters, Receivers, and Applications VII
Country/TerritoryUnited States
CitySan Diego


  • Complex oxides
  • terahertz spectroscopy


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