Thermal Activation between Landau Levels in the Organic Superconductor {beta}

Journal Article · Mon Sep 10 00:00:00 EDT 2001 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.87.117001· OSTI ID:40277595

Nam, M -S; Ardavan, A; Symington, J A; Singleton, J; Harrison, N; Mielke, C H; Schlueter, J A; Winter, R W; Gard, G L

We show that Shubnikov--de Haas oscillations in the interlayer resistivity of the organic superconductor {beta}''-( BEDT-TTF){sub 2}SF{sub 5} CH{sub 2}CF {sub 2}SO{sub 3} become very pronounced in magnetic fields {approx}60 T . The conductivity minima exhibit thermally activated behavior that can be explained simply by the presence of a Landau gap, with the quasi-one-dimensional Fermi surface sheets contributing negligibly to the conductivity. This observation, together with complete suppression of chemical potential oscillations, is consistent with an incommensurate nesting instability of the quasi-one-dimensional sheets.

• Research Organization: Argonne National Lab. (ANL), Argonne, IL (United States)
• Sponsoring Organization: (US)
• DOE Contract Number: W-31-109-ENG-38
• OSTI ID: 40277595
• Journal Information: Physical Review Letters, Vol. 87, Issue 11; Other Information: DOI: 10.1103/PhysRevLett.87.117001; Othernumber: PRLTAO000087000011117001000001; 042137PRL; PBD: 10 Sep 2001; ISSN 0031-9007
• Publisher: The American Physical Society
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
FERMI LEVEL
INSTABILITY
MAGNETIC FIELDS
ORGANIC SUPERCONDUCTORS
OSCILLATIONS