de Haas--van Alphen and Fermi surface studies of organic superconductors (ET) sub 2 X
Conference
·
OSTI ID:5742051
We report measurements of the de Haas--van Alphen (dHvA) effect in the organic superconductors (ET){sub 2}X with X = Cu(NCS){sub 2}, (NH{sub 4})Hg(SCN){sub 4} and IBr{sub 2} in fields up to 15 T and temperatures down to 0.45 K. All three materials show a strong two-dimensionality of the Fermi surface (FS) as seen by the perfect 1/cos({Theta})-behavior of the dHvA frequencies. Beating of the dHvA oscillations in X = IBr{sub 2} gives clear evidence of a warped structure of the FS cylinder. For the first time, we determine the angular dependence of the cyclotron effective mass, m{sub c}. The 1/cos({Theta})-dependence of m{sub c} causes directly observable spin slitting zeros for up to 5 angles. With our results it was possible to obtain the effective mass enhancement due to electron-phonon coupling. Estimates of {Tc} yield qualitative agreement with the observed values. 22 refs., 7 figs.
- Research Organization:
- Argonne National Lab., IL (USA)
- Sponsoring Organization:
- DOE; USDOE, Washington, DC (USA)
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 5742051
- Report Number(s):
- ANL/CP-73426; CONF-9105151--8; ON: DE91015137
- Country of Publication:
- United States
- Language:
- English
Similar Records
de Haas-van Alphen studies and Fermi surface properties of organic superconductors (ET){sub 2}X
de Haas-van Alphen studies and Fermi surface properties of organic superconductors (ET)[sub 2]X
de Haas--van Alphen studies of the organic superconductors. alpha. -(ET) sub 2 (NH sub 4 )Hg(SCN) sub 4 and. kappa. -(ET) sub 2 Cu(NCS) sub 2 (with ET = bis(ethelenedithio)-tetrathiafulvalene)
Conference
·
Wed Mar 31 23:00:00 EST 1993
·
OSTI ID:10162019
de Haas-van Alphen studies and Fermi surface properties of organic superconductors (ET)[sub 2]X
Conference
·
Wed Mar 31 23:00:00 EST 1993
·
OSTI ID:6342515
de Haas--van Alphen studies of the organic superconductors. alpha. -(ET) sub 2 (NH sub 4 )Hg(SCN) sub 4 and. kappa. -(ET) sub 2 Cu(NCS) sub 2 (with ET = bis(ethelenedithio)-tetrathiafulvalene)
Journal Article
·
Fri Jan 31 23:00:00 EST 1992
· Physical Review, B: Condensed Matter; (United States)
·
OSTI ID:7272162
Related Subjects
36 MATERIALS SCIENCE
360603* -- Materials-- Properties
426001 -- Engineering-- Superconducting Devices & Circuits-- (1990-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BEDT-TTF
BROMIDES
BROMINE COMPOUNDS
COMPLEXES
COPPER COMPLEXES
DE HAAS-VAN ALPHEN EFFECT
EFFECTIVE MASS
ELECTRON-PHONON COUPLING
ENERGY LEVELS
FERMI LEVEL
HALIDES
HALOGEN COMPOUNDS
HETEROCYCLIC COMPOUNDS
IODINE BROMIDES
IODINE COMPOUNDS
MASS
MEETINGS
MERCURY COMPLEXES
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
ORGANIC SUPERCONDUCTORS
PHYSICAL PROPERTIES
SUPERCONDUCTORS
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPLEXES
TRANSITION TEMPERATURE
360603* -- Materials-- Properties
426001 -- Engineering-- Superconducting Devices & Circuits-- (1990-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BEDT-TTF
BROMIDES
BROMINE COMPOUNDS
COMPLEXES
COPPER COMPLEXES
DE HAAS-VAN ALPHEN EFFECT
EFFECTIVE MASS
ELECTRON-PHONON COUPLING
ENERGY LEVELS
FERMI LEVEL
HALIDES
HALOGEN COMPOUNDS
HETEROCYCLIC COMPOUNDS
IODINE BROMIDES
IODINE COMPOUNDS
MASS
MEETINGS
MERCURY COMPLEXES
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
ORGANIC SUPERCONDUCTORS
PHYSICAL PROPERTIES
SUPERCONDUCTORS
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPLEXES
TRANSITION TEMPERATURE