Open AccessMETAL-INSULATOR TRANSITION IN YBa2Cu3O7-x
Author(s) -
杨永宏,
邢定钰,
龚昌德
Publication year - 1992
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.41.136
Subject(s) - curse of dimensionality , condensed matter physics , anisotropy , materials science , scaling , conductance , metal–insulator transition , electrical resistivity and conductivity , insulator (electricity) , metal , oxide , conductivity , superconductivity , physics , quantum mechanics , geometry , mathematics , optoelectronics , machine learning , computer science , metallurgy
On the basis of the scalinp: theory of locallzation, we introduce an effective dimensionality for layered structure systems, which depends on the conductivity anisotropy or the interlayer coupling. We propose that both decrease of conductance and drop in effective dimensionality account for the metal-insulator transitions in YBa2Cu3O7-x and other oxide compounds. The scaling theory in finite temperatures is also discussed to explain the temperature dependence of the normal state resistivities.