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Substrate-induced strain effects on the transport properties of pulsed laser-deposited Nb-doped SrTiO 3 films
W. Ramadan, S.B. Ogale, , S.X. Zhang, D.C. Kundaliya, I. Satoh, T. Venkatesan
Published in
Volume: 88
Issue: 14
Thin films of Nb-doped SrTiO 3 (NSTO) are grown via pulsed laser deposition (PLD) on LaAlO 3 (LAO,001), Mg Al 2O 4 (MAO,001), SrTiO 3 (STO,001), and Y-stabilized ZrO 2 (YSZ,001) substrates. The effects of the film-substrate lattice mismatch, film thickness, and substrate temperature during growth on the film properties are investigated. The electrical transport in NSTO films is shown to exhibit a strong sensitivity to strain, which is suggested to arise from the dependence of carrier mobility on bond distortions/stretching and related changes in phonon modes. © 2006 American Institute of Physics.
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