Unusual magnetic quantum oscillations in organic metals at high magnetic fields

Conference · Tue Apr 04 04:00:00 EDT 2000

OSTI ID:759059

Wosnitza, J; Wanka, S; Hagel, J; Qualls, J S; Brooks, J S; Balthes, E; Schweitzer, D; Schlueter, J A; Geiser, U

The authors report on Shubnikov-de Haas (SdH) and de Haas-van Alphen (dHvA) results for the highly two-dimensional (2D) organic superconductors {kappa}-(ET){sub 2}I{sub 3} ({Tc} = 3.5 K) and {beta}{double_prime}-(ET){sub 2}SF{sub 5}CH{sub 2}CF{sub 2}SO{sub 3} ({Tc} = 4.4 K). The SdH oscillations of both materials show an apparent deviation from the well-understood 2D dHvA signal at low temperatures and high magnetic fields. For {kappa}-(ET){sub 2}I{sub 3}, the mechanism leading to this behavior still needs to be clarified. For {beta}{double_prime}-(ET){sub 2}SF{sub 5}CH{sub 2}CF{sub 2}SO{sub 3}, an anomalous steady background part of the magnetoresistance seems to account for the observed discrepancies.

• Research Organization: Argonne National Lab., IL (US)
• Sponsoring Organization: US Department of Energy (US)
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 759059
• Report Number(s): ANL/CHM/CP-101483
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
MAGNETIC FIELDS
MAGNETORESISTANCE
METALS
ORGANIC SUPERCONDUCTORS
OSCILLATIONS
SHUBNIKOV-DE HAAS EFFECT