Light-induced superconductivity using a photoactive electric double layer

Electric double layers (EDLs) of ionic liquids have been used in superconducting field-effect transistors as nanogap capacitors. Because of the freezing of the ionic motion below ∼200 kelvin, modulations of the carrier density have been limited to the high-temperature regime. Here we observe carrier...

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Bibliographic Details
Published inScience (American Association for the Advancement of Science) Vol. 347; no. 6223; pp. 743 - 746
Main Authors Suda, Masayuki, Kato, Reizo, Yamamoto, Hiroshi M.
Format Journal Article
LanguageEnglish
Published Washington American Association for the Advancement of Science 13.02.2015
The American Association for the Advancement of Science
Subjects
Carrier density
Carriers
Electric double layer
Electric fields
Ionic liquids
Light
Nanostructure
Spiropyrans
Studies
Superconductivity
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Summary:Electric double layers (EDLs) of ionic liquids have been used in superconducting field-effect transistors as nanogap capacitors. Because of the freezing of the ionic motion below ∼200 kelvin, modulations of the carrier density have been limited to the high-temperature regime. Here we observe carrier-doping–induced superconductivity in an organic Mott insulator with a photoinduced EDL based on a photochromic spiropyran monolayer. Because the spiropyran can isomerize reversibly between nonionic and zwitterionic isomers through photochemical processes, two distinct built-in electric fields can modulate the carrier density even at cryogenic conditions.
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ISSN:0036-8075
1095-9203
DOI:10.1126/science.1256783