Title :
Langmuir-blodgett superconductors based on C/sub 60/, new donor-acceptor systems, and a new conducting polymer$
Author :
Metzger, R.M. ; Ping Wang ; Xiang-Li Wu ; Lorcy, D. ; Shcherbakova, I. ; Tormos, G.V. ; Cava, M.P.
Author_Institution :
University of Alabama
Abstract :
Summary form only given. Pure C/sub 60/ forms Langmuir-Blodgett (LB) multilayers [1]; a hysteretic low-field signal in an EPR spectrometer in a K-doped 50-layer LB multilayer of C/sub 60/ appears at or below 8.1 K, due to flux exclusion by K/sub 3/C/sub 60/ (superconductivity): this is the first LB film superconductor [2]. The crystal structure of BDMT-TTeF (1) With C/sub 60/ and a molecule of CS/sub 2/, an insulator, has been determined [3]. Other donors, such as DTDAF (2), form a 1:1 insulating and a 2:5 semiconducting (0.01 S/cm) complex with TCNQ, with evidence for TCNQ-- dianions in the solid state [4]. A conducting polymer, poly-(naphtho-[2,3 c]thiophene-alt-bithiophene) (3) has a band gap of only 0.65 eV, and a conductivity of 0.002 S/cm [5]
Keywords :
Superconductivity;
Conference_Titel :
Science and Technology of Synthetic Metals, 1994. ICSM '94. International Conference on
Conference_Location :
Seoul, Korea
DOI :
10.1109/STSM.1994.834663