Tetramethyltetraselenafulvalene salts ((TMTSF)/sub 2/X): Anisotropy and effective dimensionality of the Fermi surface
With the use of an analytic approximation for the open Fermi surface of a system with highly anisotropic two-dimensional dispersion, it is shown that the plasma frequency anisotropy is linear in the bandwidth anisotropy. Comparison to the optical data on the Bechgaard salts of tetramethyltetraselenafulvalene ((TMTSF)/sub 2/X) implies a substantial transverse bandwidth of 140 meV, a full order of magnitude larger than previously supposed, and consistent with predominantly two-dimensional behavior. A critical discussion is presented of the model of, and supporting evidence for, large quasi-one-dimensional (1D) superconducting fluctuations. It is shown, using the above result, that there are several orders of magnitude discrepancy in the temperature obtained for crossover from 3D to 1D behavior. In addition the chief experimental results claimed as proof for fluctuations are susceptible to alternate interpretations.
- Research Organization:
- Sandia National Laboratories, Albuquerque, New Mexico 87185
- OSTI ID:
- 6541297
- Journal Information:
- Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 26:8; ISSN PRBMD
- Country of Publication:
- United States
- Language:
- English
Similar Records
Superconductivity, quantum Hall effect, and magnetic field induced spin density waves in (TMTSF)[sub 2]X
Synthetic metals based on tetramethyltetraselenafulvalene(TMTSF): synthesis, structure (T = 298 and 125 K), and novel properties of (TMTSF)/sub 2/H/sub 2/F/sub 3/
Related Subjects
360603* -- Materials-- Properties
656102 -- Solid State Physics-- Superconductivity-- Acoustic
Electronic
Magnetic
Optical
& Thermal Phenomena-- (-1987)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANISOTROPY
BAND THEORY
CRYSTAL STRUCTURE
CRYSTALS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ENERGY LEVELS
FERMI LEVEL
INSTABILITY
MOLECULAR CRYSTALS
ORGANIC COMPOUNDS
PHYSICAL PROPERTIES
SPIN WAVES
SUPERCONDUCTIVITY