Accession Number:

ADA243223

Title:

Determination of the Electronic Density of States of YBa2Cu3O7-delta

Descriptive Note:

Technical rept. no. 8, Oct 1990-Sep 1991,

Corporate Author:

NAVAL WEAPONS CENTER CHINA LAKE CA

Personal Author(s):

• Reeves, M. E.
• Wolf, S. A.
• Ditmars, D. A.
• Vanderah, T. A.

Report Date:

1991-10-01

Pagination or Media Count:

20.0

Abstract:

We report precise measurements of the enthalpy of polycrystalline YBa2Cu3O7-delta at high temperatures 300 K T 700 K. From these data, we determine the lattice and electronic contributions to the specific heat. We find that anharmonicity must be included when calculating the lattice specific heat. We also find that the specific heat of the charge carriers follows the temperature dependence of a Fermi liquid with a Sommerfeld constant of 40 or - 5 mJmolK-sq. This value is three times larger than expected from band structure calculations.

Descriptors:

• *THERMAL PROPERTIES
• LIQUIDS
• HIGH TEMPERATURE
• ELECTRON DENSITY
• SPECIFIC HEAT
• CHARGE CARRIERS
• FERMI SURFACES
• PRECISION
• ENTHALPY
• MEASUREMENT
• REPORTS

Subject Categories:

• Electricity and Magnetism
• Solid State Physics
• Thermodynamics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE