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DOI 10.2172/515610
Title Giant magnetoresistance in organic superconductors {kappa}-(BEDT-TTF){sub 2}Cu(NCS){sub 2}
Creator/Author Zuo, F. [Univ. of Miami, Coral Gables, FL (United States). Dept. of Physics] ; Schlueter, J.A. ; Kelly, M.E. ; Williams, J.M. [Argonne National Lab., IL (United States)]
Publication Date1997 Aug 01
OSTI IdentifierOSTI ID: 515610; Legacy ID: DE97008255
Report Number(s)ANL/CHM/PP--90121
DOE Contract NumberW-31109-ENG-38
DOI10.2172/515610
Other Number(s)Other: ON: DE97008255; TRN: TRN: AHC29718%%125
Resource TypeTechnical Report
Resource RelationOther Information: PBD: [1997]
Research OrgArgonne National Lab., IL (United States)
Sponsoring OrgUSDOE Office of Energy Research, Washington, DC (United States)
Subject36 MATERIALS SCIENCE; ORGANIC SUPERCONDUCTORS; MAGNETORESISTANCE; BEDT-TTF; COPPER COMPOUNDS; TEMPERATURE DEPENDENCE; SUPERCONDUCTIVITY; MATHEMATICAL MODELS; MAGNETIC FLUX; PRESSURE DEPENDENCE; TRANSITION TEMPERATURE; JOSEPHSON EFFECT
Description/AbstractIn this letter, the authors report transport measurements with field and current parallel to the {alpha} axis (perpendicular to the conducting plane) in the organic superconductor {kappa}-(BEDT-TTF){sub 2}Cu(NCS){sub 2}. The magnetoresistance displays a peak effect as a function of field and temperature with the peak fields increasing linearly with decreasing temperatures. The peak resistance is found to be greater than the normal state value extrapolated from both high and low field measurements. This is a first report of above normal resistance in a superconducting state. The results are in sharp contrast to the conventional dissipation mechanisms in the mixed state for anisotropic superconductors, as in the case of Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8}. They propose a phenomenological model that the peak in the magnetoresistance is caused by a new scattering mechanism due to a strong coupling to the underlying crystal lattice of fluctuating vortices (vortex polarons). The model can semiquantitatively fit the data.
Country of PublicationUnited States
LanguageEnglish
FormatMedium: ED; Size: 16 p.
Availability INIS; OSTI as DE97008255
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System Entry Date2009 Nov 12
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