Angular dependence of the cyclotron effective mass in organic superconductors

Journal Article · Mon Jul 08 00:00:00 EDT 1991 · Physical Review Letters; (USA)

DOI:https://doi.org/10.1103/PhysRevLett.67.263· OSTI ID:5487478

Wosnitza, J; Crabtree, G W; Wang, H H; Carlson, K D; Vashon, M D; Williams, J M ^[1]

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1. Materials Science and Chemistry Divisions, Argonne National Laboratory, Argonne, Illinois 60439 (USA)

We report measurements of the de Haas--van Alphen (dHvA) effect in the organic superconductors {alpha}-(BEDT-TTF){sub 2}(NH{sub 4})Hg(SCN){sub 4} ({ital T}{sub {ital c}}{approx}1 K) and {kappa}-(BEDT-TTF){sub 2}Cu(NCS){sub 2} ({ital T}{sub {ital c}}{approx}10 K) in fields up to 15 T and temperatures down to 0.45 K. For the first time, we determine the angular dependence of the cyclotron effective mass {ital m}{sub {ital c}}, and the orientation of up to four spin-splitting zeros of the dHvA signal. The angular dependence of the amplitude of the dHvA oscillations is quantitatively explained, and the mass enhancement due to electron-phonon coupling is estimated.

• Research Organization: Argonne National Laboratory (ANL), Argonne, IL
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 5487478
• Journal Information: Physical Review Letters; (USA), Journal Name: Physical Review Letters; (USA) Vol. 67:2; ISSN PRLTA; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360603* -- Materials-- Properties
AMMONIUM COMPOUNDS
BEDT-TTF
COPPER COMPOUNDS
DE HAAS-VAN ALPHEN EFFECT
EFFECTIVE MASS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTRON-PHONON COUPLING
ENERGY LEVELS
FERMI LEVEL
HETEROCYCLIC COMPOUNDS
MASS
MERCURY COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC MERCURY COMPOUNDS
ORGANIC SULFUR COMPOUNDS
ORGANIC SUPERCONDUCTORS
PHYSICAL PROPERTIES
SUPERCONDUCTIVITY
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS
ULTRALOW TEMPERATURE