Scientific article
Open access

Electrostatic modulation of the electronic properties of Nb-doped SrTiO3 superconducting films

Published inApplied physics letters, vol. 84, no. 10, 1722
Publication date2004

We have performed ferroelectric field effect experiments using an epitaxialheterostructure composed of ferroelectricPb(Zr0.2Ti0.8)O3 and superconducting Nb-doped SrTiO3. The films were prepared on (001) SrTiO3 substrates by off-axis radio-frequency magnetron sputtering and pulsed-laser deposition. By switching the polarization field of the 500-Å-thick Pb(Zr0.2Ti0.8)O3 layer, a large change of about 30% in resistivity and a 20% shift of Tc (ΔTc∼0.05 K) were induced in the 400-Å-thick epitaxial Nb-doped SrTiO3 layer. The relationship between Tc and the electrostatically modulated average carrier concentration can be mapped onto the phase diagram of chemically doped SrTiO3

  • Epitaxy
  • Ferroelectric thin films
  • Lead
  • Ozone
  • Sputter deposition
Research group
Citation (ISO format)
TAKAHASHI, Kei et al. Electrostatic modulation of the electronic properties of Nb-doped SrTiO<sub>3</sub> superconducting films. In: Applied physics letters, 2004, vol. 84, n° 10, p. 1722. doi: 10.1063/1.1667279
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Article (Published version)
ISSN of the journal0003-6951

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