Superconductivity in epitaxial thin films of Fe1.08Te:Ox

Weidong Si; Qing Jie; Lijun Wu; Juan Zhou; Genda Gu; P. D. Johnson; Qiang Li

doi:10.1103/PhysRevB.81.092506

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Superconductivity in epitaxial thin films of Fe1.08Te:Ox

Weidong Si, Qing Jie, Lijun Wu, Juan Zhou, Genda Gu, P. D. Johnson, Qiang Li

DOI 10.1103/PhysRevB.81.092506 · Physical Review B

T1

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Abstract

Superconducting thin films of Fe1.08Te:Ox have been epitaxially grown on SrTiO3 substrates by pulsed-laser deposition in controlled oxygen atmosphere. Although the bulk Fe1.08Te is not superconducting, thin films with oxygen are superconducting with an onset and a zero resistance transition temperature around 12 and 8 K, respectively. Oxygen was found to be crucial to the superconducting properties of these films, suggesting that the oxygen incorporation can induce superconductivity in FeTe thin films. A metal-insulator transition is found at about 60 K, lower than that of bulk (∼70 K). From magnetoresistive measurements, we obtained the irreversibility line and the upper critical field.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Fe1.08Te:Ox Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	12	Pressure not reported	onset
Fe1.08Te:Ox Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	8	Pressure not reported	zero_resistance
Fe1.08Te:Ox Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	5	Pressure not reported	onset
FeSe Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	8	Pressure not reported	unknown
FeSe Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	37	7 GPa	unknown
FeTe0.8S0.2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown