Search for Superconductivity with Nanodevices
نویسندگان
چکیده
Carrier density is one of the most important parameters in changing the electronic properties of materials. The most useful and conventional way to control the carrier density is chemical syntheses. On the other hand, physicists and electronic engineers have developed a field effect transistor (FET) device for changing the carrier density by electric fields. Furthermore, by introducing a liquid gating technique, electric field induced carrier density can reach the level to induce insulator-metal transition and even superconductivity. The liquid gated device is providing us with new opportunities to create new states of matter, which are not accessible through conventional chemistry. Here, we chose an organic polymer, polythiophene, and fabricated a gated and liquid gated FET device by a drop-casting method. Polythiophenes have a variety of derivatives whose crystallinity is much better than other organic polymers. This is highly beneficial to promote the carrier transport as compared to other polymer systems, and thus, polythiophene could be a promising candidate to observe an electric field induced metallic state. We made a direct comparison between solid gated and liquid gated FETs and discuss the possibility of insulator-metal transition.
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پیشگفتار
The First National Conference on Advances in Superconductivity was the first of a series of conferences in the field of superconductivity planned to be held biannually in one of the universities or scientific research centers in the country. The goal of these meetings is to bring together groups of researchers in the field of experimental and theoretical superconductivity, to discuss their la...
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