Manifestations of 2 1/2-order transitions and Kohn singularities in the pressure dependence of the superconducting transition temperature

Journal Article · Fri Dec 31 23:00:00 EST 1976 · Sov. J. Low Temp. Phys. (Engl. Transl.); (United States)

OSTI ID:7100097

Makarov, V I

A theory is suggested for the pressure behavior of T/sub c/ in superconductors which accounts for changes due to pressure not only in the energy spectrum of conduction electrons but also in the phonon spectrum and in the electron--phonon interaction function. It is shown that in a superconductor subjected to pressure par. deltaT/sub c//par. deltaP may have two types of singularities: one type due to the 2 1/2-order transition and another due to Kohn singularity. The dependence of par. deltaT/sub c//par. deltaP on the impurity concentration is a reliable indicator which can be used to distinguish between these two types of singularities experimentally.

• Research Organization: Khar'kov Physicotechnical Institute, Academy of Sciences of the Ukrainian SSR
• OSTI ID: 7100097
• Journal Information: Sov. J. Low Temp. Phys. (Engl. Transl.); (United States), Journal Name: Sov. J. Low Temp. Phys. (Engl. Transl.); (United States) Vol. 3:1; ISSN SJLPD
• Country of Publication: United States
• Language: English

Related Subjects

656102* -- Solid State Physics-- Superconductivity-- Acoustic
Electronic
Magnetic
Optical
& Thermal Phenomena-- (-1987)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ELECTRON-PHONON COUPLING
ENERGY LEVELS
ENERGY SPECTRA
FERMI LEVEL
IMPURITIES
PHONONS
PHYSICAL PROPERTIES
PRESSURE DEPENDENCE
QUASI PARTICLES
SPECTRA
SUPERCONDUCTORS
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE