Design and Synthesis of Organic Superconductors (FY92 URI/RIP)
Abstract
A number of mixed-valence (2:1), conducting salts of bis(ethylenedithio)tetraselena-fulvalene (BETS) have been prepared. Four (GaCl(4), SbF(6), CF(3)SO(3) and CuN(CN)(2)Br) have been characterized in detail (X-ray crystallography, DC resistivity from 300-1 OK, rf penetration depth measurements (0.5K), pressure studies from 0.5-5 kbar at 4K, and tight-binding band calculations). The salts are highly metallic to low temperatures but do not exhibit superconductivity under the experimental conditions explored. The synthesis of a new synthetic metal precursor, bis(ethylenedithio) tetrathionaphthalene (BEDT-TTN), is about three-quarters completed. Spin density wave (SDW) and charge density wave (CDW) phenomena of three organic superconductors (k-(BEDT-TTF)CuN(CN)(2)Cl, (TMTSF)2PF6, and (TMTSF)(2)ReO(4), where BEDTTTF is bis(ethylenedithio)tetrathiafulvalene and TMTSF is tetramethyltetraselenafulvalene) have been studied in collaboration with Professor J.W. Brill (Department of Physics, University of Kentucky). The three organic metals avert the SDW and CDW transitions under pressure and become superconductors. Organic superconductor, Synthesis, Structure, Resistivity, SDW, CDW.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 29, 1993
- Accession Number
- ADA281308
Entities
People
- Lawrence K. Montgomery
Organizations
- Indiana University