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

被引：34

作者：

Takahashi, KS

Matthey, D

Jaccard, D

Triscone, JM

Shibuya, K

Ohnishi, T

Lippmaa, M

机构：

[1] Univ Geneva, DPMC, CH-1211 Geneva 4, Switzerland

[2] Univ Tokyo, Inst Solid State Phys, Chiba 2778581, Japan

来源：

APPLIED PHYSICS LETTERS | 2004年 / 84卷 / 10期

关键词：

D O I：

10.1063/1.1667279

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We have performed ferroelectric field effect experiments using an epitaxial heterostructure composed of ferroelectric Pb(Zr0.2Ti0.8)O-3 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-A-thick Pb(Zr0.2Ti0.8)O-3 layer, a large change of about 30% in resistivity and a 20% shift of T-c (DeltaT(c)similar to0.05 K) were induced in the 400-A-thick epitaxial Nb-doped SrTiO3 layer. The relationship between T-c and the electrostatically modulated average carrier concentration can be mapped onto the phase diagram of chemically doped SrTiO3. (C) 2004 American Institute of Physics.

引用

页码：1722 / 1724

页数：3

共 28 条

[1] Electrostatic modulation of superconductivity in ultrathin GdBa2Cu3O7-x films [J].