Large spectral weight transfer in optical conductivity of SrTiO3 induced by intrinsic vacancies | Zendy

Teguh Citra Asmara | Zendy; Xiao Renshaw Wang | Zendy; Iman Santoso | Zendy; Qinfang Zhang | Zendy; Tomonori Shirakawa | Zendy; Dongchen Qi | Zendy; A. Kotlov | Zendy; M. Motapothula | Zendy; Mark B. H. Breese | Zendy; T. Venkatesan | Zendy; Seiji Yunoki | Zendy; Michael Rübhausen | Zendy; Ariando Ariando | Zendy; Andrivo Rusydi | Zendy

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Large spectral weight transfer in optical conductivity of SrTiO3 induced by intrinsic vacancies

Author(s) -

Teguh Citra Asmara,

Xiao Renshaw Wang,

Iman Santoso,

Qinfang Zhang,

Tomonori Shirakawa,

Dongchen Qi,

A. Kotlov,

M. Motapothula,

Mark B. H. Breese,

T. Venkatesan,

Seiji Yunoki,

Michael Rübhausen,

Ariando Ariando,

Andrivo Rusydi

Publication year - 2014

Publication title -

journal of applied physics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.699

H-Index - 319

eISSN - 1089-7550

pISSN - 0021-8979

DOI - 10.1063/1.4878675

Subject(s) - ultraviolet , conductivity , band gap , ellipsometry , optical conductivity , materials science , ion , range (aeronautics) , electrical resistivity and conductivity , spectral line , reflectivity , analytical chemistry (journal) , atomic physics , condensed matter physics , chemistry , optoelectronics , thin film , optics , physics , nanotechnology , organic chemistry , chromatography , astronomy , composite material , quantum mechanics

The optical conductivity (σ1) of SrTiO3 for various vacancies has been systematically studied using a combination of ultraviolet-vacuum ultraviolet reflectivity and spectroscopic ellipsometry. For cation (Ti) vacancies, σ1 shows large spectral weight transfer over a wide range of energy from as high as 35 eV to as low as 0.5 eV and the presence of mid-gap states, suggesting that strong correlations play an important role. Meanwhile, for anion (O) vacancies, σ1 shows changes from 7.4 eV up to 35 eV

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