Open AccessTRANSPORT PROPERTIES OF TETRAGONAL AND ORTHOR- HOMBIC PHASE IN YBa2Cu3O7-x SYSTEM
Author(s) -
Yang Ruan,
Hu Xue-Long,
Guangshe Li,
Guangyao Meng,
Hu Junbao,
Zhihong Jiang,
Yuheng Zhang
Publication year - 1989
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.38.511
Subject(s) - seebeck coefficient , tetragonal crystal system , condensed matter physics , materials science , phase (matter) , phonon drag , superconductivity , orthorhombic crystal system , electrical resistivity and conductivity , phonon , high temperature superconductivity , thermal conductivity , physics , optics , diffraction , quantum mechanics , composite material
The resistance and thermoelectric power were measured for a series of single phase YBa2 Cu3O7-x samples with different quenching temperature. The relation between the thermopower and temperature indicates that there exists a phonon-drag peak in orthorhombic phase sample. The peak disappears in tetragonal phase sample. This phenomeron suggests that the electron-phonon interaction influences the superconduc tivity of YBa2 Cu3O7-x. According to the experimental data of thermoelectric power, estimation for the Fermi energy and carrier concentration of the sample are made.