EVIDENCE FOR STRONG ELECTRON-PHONON COUPLING FROM THE SPECIFIC-HEAT OF YBA2CU3O7-DELTA

被引：30

作者：

REEVES, ME

DITMARS, DA

WOLF, SA

VANDERAH, TA

KRESIN, VZ

机构：

[1] NATL INST STAND & TECHNOL, GAITHERSBURG, MD 20899 USA

[2] USN, CTR WEAP, CHINA LAKE, CA 93555 USA

[3] LAWRENCE BERKELEY LAB, BERKELEY, CA 94720 USA

来源：

PHYSICAL REVIEW B | 1993年 / 47卷 / 10期

关键词：

D O I：

10.1103/PhysRevB.47.6065

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report precise measurements of the relative enthalpy of polycrystalline YBa2Cu3O7-delta at high temperatures (273 K < T < 700 K). From these data, we determine the lattice and electronic contributions to the specific heat. We find that the specific heat of the charge carriers follows the temperature dependence of a Fermi liquid with a Sommerfeld constant of 25+/-3 mJ/mole K2. By comparing our data to measurements made at low temperatures, we determine that the electron-phonon coupling is strong in YBa2Cu3O7-delta and adequate to account for the high transition temperature.

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页码：6065 / 6068

页数：4

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