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RESEARCH PRODUCT
Possibility of unconventional superconductivity of SrTiO3−δ
H. AdrianMartin Jourdansubject
SuperconductivityBipolaronMaterials scienceCondensed matter physicsEnergy Engineering and Power TechnologyDielectricCondensed Matter PhysicsElectronic Optical and Magnetic MaterialsMagnetic fieldCondensed Matter::Materials ScienceElectrical resistivity and conductivityCondensed Matter::SuperconductivityPairingElectrical and Electronic EngineeringElectric currentCritical fielddescription
Abstract SrTiO3−δ can show metallic behavior and superconductivity at T It is demonstrated that by variation of the annealing temperature in vacuum the transport properties of SrTiO3−δ can be tuned continuously from semiconducting to metallic. We present measurements of the upper critical field Bc2(T) which show near Tc a positive curvature. This unusual temperature dependence is consistent with a model of weakly interacting charged bosons which condense in the superconducting state (local pairing). However, measurements of current–voltage curves reveal only small critical currents of our samples. This observation is discussed in the framework of doping inhomogeneities.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2003-05-01 | Physica C: Superconductivity |