Effect of annealing on optical absorption of LaAlO3 at terahertz frequencies

Ken Ichi Nomura*, Shimpei Okami, Xiaojun Xie, Maya Mizuno, Kaori Fukunaga, Yoshimichi Ohki

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)


Absorption spectra of LaAlO3(100) single crystals were measured at frequencies from 1.0 to 3.5 THz. A new absorption peak appears at ̃3:0 THz after annealing at temperatures above 500 °C. Simultaneously, striped domains with widths ranging from about 20 to about 300 μm in the original samples completely disappeared. Since oxygen vacancies are assumed to play an important role in the formation of domains, the absorption peak at ̃3:0 THz seems to be related to oxygen vacancies

Original languageEnglish
Article number021502
JournalJapanese journal of applied physics
Issue number2
Publication statusPublished - 2011 Feb

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)


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