Upper critical magnetic field of superconductors with a dielectric gap on the Fermi-surface sections

Journal Article · Fri Jul 01 00:00:00 EDT 1988 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.38.297· OSTI ID:7185484

Gabovich, A M; Shpigel, A S

In the framework of the model describing a superconductor with a dielectric gap on the Fermi-surface sections, the equation for the upper critical magnetic field H/sub c//sub 2/(T) in the dirty limit is obtained and solved. It is shown that due to the electron spectrum dielectrization, the quantities H/sub c//sub 2/(0) and (chemically bonddH/sub c//sub 2//dTchemically bond)/sub T //sub = //sub =/ increase and the curvature (d/sup 2/H/sub c2//dT/sup 2/)/sub T //sub = //sub =/ may become positive. These results are in good agreement with experimental data for a number of substances with charge- and spin-density waves, e.g., Chevrel phases, layered transition-metal dichalcogenides, antiferromagnetic organic metals (TMTSF)/sub 2/X, Cr/sub 1-//sub x/Re/sub x/ alloys (where TMTSF is an abbreviation for tetramethyltetraselenafulvalene), and the heavy-fermion superconductor URu/sub 2/Si/sub 2/.

• Research Organization: Institute of Physics of the Academy of Sciences of the Ukrainian SSR, Prospekt Nauki 144, 252chemically bond650 Kiev 28, Union of Soviet Socialist Republics
• OSTI ID: 7185484
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Vol. 38:1
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
SUPERCONDUCTORS
CRITICAL FIELD
CHALCOGENIDES
ELECTRON SPECTRA
ENERGY GAP
FERMI LEVEL
HAMILTONIANS
NIOBIUM SELENIDES
TEMPERATURE DEPENDENCE
TMTSF
ENERGY LEVELS
HETEROCYCLIC COMPOUNDS
MAGNETIC FIELDS
MATHEMATICAL OPERATORS
NIOBIUM COMPOUNDS
ORGANIC COMPOUNDS
QUANTUM OPERATORS
REFRACTORY METAL COMPOUNDS
SELENIDES
SELENIUM COMPOUNDS
SPECTRA
TRANSITION ELEMENT COMPOUNDS
656100* - Condensed Matter Physics- Superconductivity