Superconducting properties of organic composites: blends of βco-(ET)2I3 with paraffin and polycarbonate

Superconductivity in metal-mixed ion-implanted polymer films

“…In addition to a weak metallic temperature dependence, we observe the onset of superconductivity at temperatures T Ͻ 3 K. Previous studies of organic superconductor-polymer blends ͑e.g., ␤Ј-͑ET͒ 2 I 3 microcrystals in polycarbonate͒ have observed a partial Meissner effect. 10 Here we report a plastic material that shows a complete transition to a robust zero electrical resistance state, suggesting potential technological applications for the ion-beam processed polymer that are not possible with superconducting-polymer blends.…”

“…β-(ET) 2 I 3 microcrystals in polycarbonate) have observed a partial Meissner effect. 14 Here we report a plastic material that shows a complete transition to a robust zero electrical resistance state, suggesting potential technological applications for the ion-beam processed polymer that are not possible with superconducting-polymer blends. Our samples were prepared by evaporating a ~10 nm layer of 95% Sn : 5% Sb alloy onto a 0.1 mm thick PEEK film, and subsequently implanting the metallized surface to doses of 10 16 (sample A) and 10 15 (sample B) ions/cm 2 with a 50 keV N + beam.…”

Preparation of metal mixed plastic superconductors: Electrical properties of tin-antimony thin films on plastic substrates

“…The majority of work towards overcoming the unattractive materials properties of organic charge transfer salts has focused on embedding microcrystals of ␤-͑BEDT-TTF͒ 2 I 3 in a polycarbonate matrix. [7][8][9][10] These composite materials retain many of the desirable materials properties of polycarbonate, such as its flexibility, and display some hints of superconductivity including a partial Meissner effect 7 and a drop in resistivity 8,10 below ϳ5 K. However, there are no reports of such materials displaying zero electrical resistance.…”

Ferroelectric polarization in α-(ET)2I2Br studied by second-harmonic generation microscopy

“…To avoid the heating effect, we embedded the sample into a polymer resin, then sandwiched by sapphire slides for good thermal conductivity. One may concern that the matrix can cause undesirable influence to the sample such as inhomogeneous pressure [9,10]. Since some ferroelectrics are extraordinary structure sensitive, crystal strain caused by inhomogeneous pressure might lead to position dependence on ferroelectric polarization, which strongly affects the SHG intensity induced by the tightly focused beam.…”