TITLE

Localized electronic states induced by defects and possible origin of ferroelectricity in strontium titanate thin films

AUTHOR(S)
Kim, Y. S.; Kim, J.; Moon, S. J.; Choi, W. S.; Chang, Y. J.; Yoon, J.-G.; Yu, J.; Chung, J.-S.; Noh, T. W.
PUB. DATE
May 2009
SOURCE
Applied Physics Letters;5/18/2009, Vol. 94 Issue 20, p202906
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Several defect configurations including oxygen vacancies have been investigated as possible origins of the reported room-temperature ferroelectricity of strontium titanate (STO) thin films [Y. S. Kim et al., Appl. Phys. Lett. 91, 042908 (2007)]. First-principles calculations revealed that the Sr–O–O vacancy complexes create deep localized states in the band gap of SrTiO3 without affecting its insulating property. These results are consistent with electronic structural changes determined from optical transmission and x-ray absorption measurements. Our work suggests importance of oxygen vacancies and their complexes in understanding of electronic properties of perovskite oxide thin films, including STO.
ACCESSION #
40125720

 

Related Articles

  • Effects of volume evolution of static and dynamic polar nanoregions on the dielectric behavior of relaxors. Shi, Y. P.; Soh, A. K. // Applied Physics Letters;8/29/2011, Vol. 99 Issue 9, p092908 

    Recent experiments revealed unusual dielectric behaviors of Pb(Mg1/3Nb2/3)O3 originated from polar nanoregions (PNRs). Thus, Pauli's master equation is adopted to investigate the distinct dielectric responses, correlation strength, and volume evolutions of static and dynamic PNRs. Our findings...

  • Ferroelectric thin-films: The emancipation of ferroelectricity. Muralt, Paul // Nature Materials;Jan2007, Vol. 6 Issue 1, p8 

    The article presents a study on the generation of ferroelectricity in the ferroelectric thin films. The high resolution microscopy of ultra-thin ferroelectric films reveals a weak coupling of polarization down to unit-cell dimensions. The established theoretical figure can be revived by the...

  • Ferroelectric properties of sol-gel derived Ca modified PbZr0.52Ti0.48O3 films. Ezhilvalavan, S.; Samper, Victor D. // Applied Physics Letters;9/26/2005, Vol. 87 Issue 13, p132902 

    In this letter, we report the ferroelectric properties and leakage current characteristics of Ca modified PbZr0.52Ti0.48O3 (PCZT) films prepared by a sol-gel process. The PCZT film of thickness ∼1 μm shows excellent ferroelectric properties in terms of large remnant polarization of...

  • Note: Electrical and thermal characterization of a ferroelectric thin film with an electro-thermal nanoprobe. Jackson, R.; Fletcher, P. C.; Jambunathan, K.; Damodaran, A. R.; Emmerich, J. N.; Teng, H.; Martin, L. W.; King, W. P.; Wu, Y. // Review of Scientific Instruments;Jul2012, Vol. 83 Issue 7, p076105 

    The localized temperature-dependent piezoelectric response of ferroelectric barium strontium titanate (BST) thin films is studied using an electro-thermal (ET) nanoprobe. The ET probe provides independent electrical and thermal excitation to a nanometer-scale volume of the specimen and is...

  • Substitution effects on the ferroelectric properties of BiFeO3 thin films prepared by chemical solution deposition. Kim, Jong Kuk; Kim, Sang Su; Kim, Won-Jeong; Bhalla, Amar S. // Journal of Applied Physics;1/1/2007, Vol. 101 Issue 1, p014108 

    Ferroelectric properties of Cr-substituted BiFeO3 (BFCr) and Pb-cosubstituted BFCr films prepared by a chemical solution deposition method and annealed at 550 °C in nitrogen have been studied. X-ray diffraction measurements revealed that the thin films were composed of a rhombohedrally...

  • Temperature-dependent fatigue behaviors of ferroelectric Pb(Zr0.52Ti0.48)O3 and Pb0.75La0.25TiO3 thin films. Liu, J.-M.; Wang, Y.; Zhu, C.; Yuan, G. L.; Zhang, S. T. // Applied Physics Letters;7/25/2005, Vol. 87 Issue 4, p042904 

    The polarization switching fatigue of ABO3-perovskite ferroelectric thin-film Pb(Zr0.52Ti0.48)O3 (PZT) prepared by metalorganic decomposition (MOD) and Pb0.75La0.25TiO3 (PLT) prepared by pulsed laser deposition (PLD), are investigated. The temperature as a degree of freedom is employed to...

  • The best is yet to come.  // Nature Materials;Jan2007, Vol. 6 Issue 1, p1 

    The article reflects on the development of multiferroics materials that show both ferromagnetism and ferroelectricity. He mentioned that the problem was mainly on electrons on the outer atomic shells in common transition metal oxide ferroelectrics and ferromagnets. However, there are still much...

  • Relaxation of induced polar state in relaxor PbMg1/3Nb2/3O3 thin films studied by piezoresponse force microscopy. Shvartsman, V. V.; Kholkin, A. L.; Tyunina, M.; Levoska, J. // Applied Physics Letters;5/30/2005, Vol. 86 Issue 22, p222907 

    Polarization state in epitaxial thin films of relaxor ferroelectric PbMg1/3Nb2/3O3 (PMN) was experimentally studied at the nanoscale using a piezoresponse force microscopy (PFM). In the absence of a dc bias applied to the PFM tip, no piezoelectric activity could be found on most of the surface...

  • Relaxor ferroelectricity in strained epitaxial SrTiO3 thin films on DyScO3 substrates. Biegalski, M. D.; Jia, Y.; Schlom, D. G.; Trolier-McKinstry, S.; Streiffer, S. K.; Sherman, V.; Uecker, R.; Reiche, P. // Applied Physics Letters;5/8/2006, Vol. 88 Issue 19, p192907 

    The ferroelectric properties of 500 Å thick strained, epitaxial SrTiO3 films grown on DyScO3 substrates by reactive molecular-beam epitaxy are reported. Despite the near 1% biaxial tensile strain, the x-ray rocking curve full widths at half maximum in ω are as narrow as 7 arc sec...

Share

Read the Article

Courtesy of VIRGINIA BEACH PUBLIC LIBRARY AND SYSTEM

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics