Effect of sharp structure in the electronic density of states on the electron--photon coupling in high T/sub c/ superconductors

Conference · Wed Jan 01 00:00:00 EST 1975

OSTI ID:4117866

Fradin, F Y

The evidence for sharp structure in the electronic density of states N(epsilon) of certain classes of high T/sub c/ superconductors is based on the normal state temperature dependence of the spin susceptibility chi, electronic specific-heat coefficient $gamma$, electrical resistivity rho, and nuclear spin- lattice relaxation rate 1/T$sub 1$. Model calculations of chi, $gamma$, rho, and T$sub 1$ in the rigid N(epsilon) approximation and of chi and $gamma$ for a temperature dependent N(epsilon) are presented for V$sub 3$Ga and V$sub 3$Si. The model calculations were used to calculate the explicit temperature dependence of the electron mass enhancement and the renormalized electronic specific heat coefficient. The temperature dependence of the dielectric screening, which can have an important effect on renormalizing the phonon frequencies at low temperatures, is also discussed. (auth)

• Research Organization: Argonne National Lab., Ill. (USA)
• DOE Contract Number: W-31-109-ENG-38
• NSA Number: NSA-33-012603
• OSTI ID: 4117866
• Report Number(s): CONF-751212-4
• Resource Relation: Conference: International conference on low lying lattice vibrational models and their relationship to superconductivity and ferroelectricity, San Juan, Puerto Rico, 1 Dec 1975; Other Information: Orig. Receipt Date: 30-JUN-76
• Country of Publication: United States
• Language: English

Related Subjects

N50230* -Metals
Ceramics
& Other Materials-Metals & Alloys-Properties
Structure & Phase Studies
N66200 -Physics (Low Temperature)-Superconductivity
360104* -Materials-Metals & Alloys-Physical Properties
*VANADIUM BASE ALLOYS- ELECTRONIC STRUCTURE
COUPLING
ELECTRIC CONDUCTIVITY
ELECTRONIC SPECIFIC HEAT
INTERMETALLIC COMPOUNDS
PHONONS
SILICON ALLOYS
SPIN- LATTICE RELAXATION
SUPERCONDUCTIVITY
TEMPERATURE DEPENDENCE GALLIUM ALLOYS