Determination of the Electronic Density of States of YBa2Cu3O7-delta
Technical rept. no. 8, Oct 1990-Sep 1991,
NAVAL WEAPONS CENTER CHINA LAKE CA
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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.
- Electricity and Magnetism
- Solid State Physics