Reversible modulation of [Tc] in conductive polymer/high temperature superconductor assemblies

Journal Article · Wed Feb 10 04:00:00 EST 1993 · Journal of the American Chemical Society; (United States)

DOI:https://doi.org/10.1021/ja00056a082· OSTI ID:6220120

Haupt, S G; Riley, D R; Jones, C T; Zhao, Jianai; McDevitt, J T ^[1]

---

1. Univ. of Texas, Austin (United States)

Here the authors report the preparation of a hybrid conducting polymer/high-temperature superconductor device consisting of a polypyrrole-coated YBa[sub 2]Cu[sub 3]O[sub 7[minus][delta]] microbridge. Electrochemical techniques are exploited to alter the oxidation state of the polymer, and in doing so, they observe for the first time that superconductivity can be modulated in a controllable and reproducible fashion by a polymer layer. Whereas the neutral (insulating) polypyrrole only slightly influences the electrical properties of the underlying YBa[sub 2]Cu[sub 3]O[sub 7[minus][delta]] film, the oxidized (conductive) polymer depresses [Tc] by up to 15 K. Thus, a new type of molecular switch for controlling superconductivity is demonstrated. There are a number of important motivating factors for studying composite conductive polymer/high-[Tc] structures. The use of conductive polymers provides an alternative strategy for the construction of superconductor devices and circuits. Moreover, the hybrid assemblies described in this paper may be utilized to study electron- and energy-transfer phenomena which occur at molecule/superconductor interfaces at temperatures above and below [Tc]. 23 refs., 2 figs.

• OSTI ID: 6220120
• Journal Information: Journal of the American Chemical Society; (United States), Journal Name: Journal of the American Chemical Society; (United States) Vol. 115:3; ISSN JACSAT; ISSN 0002-7863
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360201 -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
360207* -- Ceramics
Cermets
& Refractories-- Superconducting Properties-- (1992-)
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400400 -- Electrochemistry
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
CHALCOGENIDES
CHEMICAL REACTIONS
CHEMISTRY
COMPOSITE MATERIALS
COPPER COMPOUNDS
ELECTROCHEMISTRY
FABRICATION
MATERIALS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
OXIDATION
OXIDES
OXYGEN COMPOUNDS
POLYMERS
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS
VALENCE
YTTRIUM COMPOUNDS