Open AccessCritical parameters of superconducting materials and structures
Author(s) -
M.J. Fluss,
R.H. Howell,
P.A. Sterne,
J. W. Dykes,
W.D. Mosley,
A. Chaiken,
K.M. Ralls,
H. B. Radousky
Publication year - 1995
Language(s) - English
Resource type - Reports
DOI - 10.2172/93594
Subject(s) - superconductivity , fermi surface , condensed matter physics , pairing , high temperature superconductivity , positron annihilation , materials science , stoichiometry , photoemission spectroscopy , electronic structure , fermi level , electron , crystallography , x ray photoelectron spectroscopy , physics , positron , chemistry , nuclear magnetic resonance , nuclear physics
We report here the completion of a one year project to investigate the synthesis, electronic structure, defect structure, and physical transport properties of high temperature superconducting oxide materials. During the course of this project we produced some of the finest samples of single crystal detwinned YBa{sub 2}Cu{sub 3}O{sub 7}, and stoichiometrically perfect (Ba,K)BiO{sub 3}. We deduced the Fermi surface of YBa{sub 2}Cu{sub 3}O{sub 7}, (La,Sr){sub 2}CuO{sub 4}, and (Ba,K)BiO{sub 3} through the recording of the electron momentum density in these materials as measured by positron annihilation spectroscopy and angle resolved photoemission. We also performed extensive studies on Pr substituted (Y,Pr)Ba{sub 2}Cu{sub 3}O{sub 7} so as to further understand the origin of the electron pairing leading to superconductivity