Effect of annealing on optical absorption of LaAlO3 at terahertz frequencies

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

doi:10.1143/JJAP.50.021502

Effect of annealing on optical absorption of LaAlO₃ at terahertz frequencies

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

School of Advanced Science and Engineering

Research output: Contribution to journal › Article › peer-review

10 Citations (Scopus)

Abstract

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 language	English
Article number	021502
Journal	Japanese journal of applied physics
Volume	50
Issue number	2
DOIs	https://doi.org/10.1143/JJAP.50.021502
Publication status	Published - 2011 Feb 1

ASJC Scopus subject areas

Engineering(all)
Physics and Astronomy(all)

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abstract = "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",

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AU - Nomura, Ken Ichi

AU - Okami, Shimpei

AU - Xie, Xiaojun

AU - Mizuno, Maya

AU - Fukunaga, Kaori

AU - Ohki, Yoshimichi

PY - 2011/2/1

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N2 - 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

AB - 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

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