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Browse Journals & Magazines > Applied Physics Letters ...> Volume:84 Issue:10 Help

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

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7 Author(s)
Takahashi, K.S. ; DPMC, University of Geneva, 24 Quai Ernest Ansermet, 1211 Geneva 4, Switzerland ; Matthey, D. ; Jaccard, D. ; Triscone, J.-M.
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We have performed ferroelectric field effect experiments using an epitaxial heterostructure composed of ferroelectric Pb(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. © 2004 American Institute of Physics.

Published in:
Applied Physics Letters  (Volume:84 ,  Issue: 10 )

Date of Publication: Mar 2004

Page(s):
1722 - 1724
ISSN :
0003-6951
Digital Object Identifier :
10.1063/1.1667279
Product Type:
Journals & Magazines
Date of Current Version :
18 June 2009
Issue Date :
Mar 2004

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