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

被引：13

作者：

Asmara, T. C. ^{[1
]}

Wang, X. ^{[1
]}

Santoso, I. ^{[1
]}

Zhang, Q. ^{[2
,3
]}

Shirakawa, T. ^{[2
,3
]}

Qi, D. ^{[1
]}

Kotlov, A. ^{[4
]}

Motapothula, M. ^{[1
]}

Breese, M. H. ^{[1
]}

Venkatesan, T. ^{[1
]}

Yunoki, S. ^{[2
,3
]}

Ruebhausen, M. ^{[5
,6
]}

Ariando ^{[1
]}

Rusydi, A. ^{[1
]}

机构：

[1] Natl Univ Singapore, Dept Phys, NUSNNI NanoCore, Singapore 117576, Singapore

[2] RIKEN ASI, Computat Condensed Matter Phys Lab, Wako, Saitama 3510198, Japan

[3] Japan Sci & Technol Agcy, CREST, Kawaguchi, Saitama 3320012, Japan

[4] Deutsch Elektronen Synchrotron DESY, Hamburger Synchrotronstrahlungslab HASYLAB, D-22603 Hamburg, Germany

[5] Univ Hamburg, Inst Angew Phys, D-20355 Hamburg, Germany

[6] Ctr Free Electron Laser Sci CFEL, D-22607 Hamburg, Germany

来源：

JOURNAL OF APPLIED PHYSICS | 2014年 / 115卷 / 21期

基金：

新加坡国家研究基金会;

关键词：

STRONTIUM-TITANATE; SEMICONDUCTING SRTIO3; ELECTRONIC-STRUCTURE; CORRELATED SYSTEMS; BAND; FERROELECTRICITY; TRANSPARENT; ABSORPTION; TRANSPORT; BATIO3;

D O I：

10.1063/1.4878675

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The optical conductivity (sigma(1)) of SrTiO3 for various vacancies has been systematically studied using a combination of ultraviolet-vacuum ultraviolet reflectivity and spectroscopic ellipsometry. For cation (Ti) vacancies, sigma(1) 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, sigma(1) shows changes from 7.4 eV up to 35 eV. (C) 2014 AIP Publishing LLC.

引用

页数：5

共 32 条

[1] Multifunctional Ti1-xTaxO2: Ta doping or alloying? [J].

Barman, A. Roy ;

Motapothula, M. ;

Annadi, A. ;

Gopinadhan, K. ;

Zhao, Y. L. ;

Yong, Z. ;

Santoso, I. ;

Ariando ;

Breese, M. ;

Rusydi, A. ;

Dhar, S. ;

Venkatesan, T. .

APPLIED PHYSICS LETTERS, 2011, 98 (07)

[2] OBSERVATION OF A MIDINFRARED BAND IN SRTIO3-Y [J].

CALVANI, P ;

CAPIZZI, M ;

DONATO, F ;

LUPI, S ;

MASELLI, P ;

PESCHIAROLI, D .

PHYSICAL REVIEW B, 1993, 47 (14) :8917-8922

[3] OPTICAL PROPERTIES AND BAND STRUCTURE OF SRTIO3 AND BATIO3 [J].

CARDONA, M .

PHYSICAL REVIEW, 1965, 140 (2A) :A651-&

[4] OXYGEN 1S X-RAY-ABSORPTION EDGES OF TRANSITION-METAL OXIDES [J].

DEGROOT, FMF ;

GRIONI, M ;

FUGGLE, JC ;

GHIJSEN, J ;

SAWATZKY, GA ;

PETERSEN, H .

PHYSICAL REVIEW B, 1989, 40 (08) :5715-5723

[5] ELECTRONIC DENSITY OF STATES FOR PEROVSKITES [J].

ELLIALTIOGLU, S ;

WOLFRAM, T .

PHYSICAL REVIEW B, 1977, 15 (12) :5909-5911

[6] ANOMALOUS TRANSFER OF SPECTRAL WEIGHT IN DOPED STRONGLY CORRELATED SYSTEMS [J].

ESKES, H ;

MEINDERS, MBJ ;

SAWATZKY, GA .

PHYSICAL REVIEW LETTERS, 1991, 67 (08) :1035-1038

[7] ELECTRONIC TRANSPORT IN STRONTIUM TITANATE [J].

FREDERIKSE, HPR ;

THURBER, WR ;

HOSLER, WR .

PHYSICAL REVIEW, 1964, 134 (2A) :A442-+

[8]

GOODENOUGH JB, 2001, STRUCTURE BONDING, V98

[9] Room-temperature ferroelectricity in strained SrTiO3 [J].

Haeni, JH ;

Irvin, P ;

Chang, W ;

Uecker, R ;

Reiche, P ;

Li, YL ;

Choudhury, S ;

Tian, W ;

Hawley, ME ;

Craigo, B ;

Tagantsev, AK ;

Pan, XQ ;

Streiffer, SK ;

Chen, LQ ;

Kirchoefer, SW ;

Levy, J ;

Schlom, DG .

NATURE, 2004, 430 (7001) :758-761

[10] X-RAY INTERACTIONS - PHOTOABSORPTION, SCATTERING, TRANSMISSION, AND REFLECTION AT E=50-30,000 EV, Z=1-92 [J].

HENKE, BL ;

GULLIKSON, EM ;

DAVIS, JC .

ATOMIC DATA AND NUCLEAR DATA TABLES, 1993, 54 (02) :181-342

← 1 2 3 4 →