Superconductivity and magnetic properties of the t-J model of cuprate perovskites

Conference · Sun Dec 20 04:00:00 EST 1998 · International Journal of Modern Physics B

OSTI ID:6442766

Sherman, A; Schreiber, M ^[1]

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1. Technische Univ., Chemnitz (Germany). Inst. fuer Physik

The authors apply the spin-wave theory with the additional constraint of zero staggered magnetization to investigate the two-dimensional t-J model in the paramagnetic state in the ranges of hole concentrations 0.02 [approx lt] x [approx lt] 0.17 and temperatures T [approx lt] 100 K. In this region the hole spectrum is nonmetallic and contains a pseudogap with properties similar to those observed in Bi2212 photoemission. The calculated spin correlation length, susceptibility, spin-lattice relaxation times at the Cu and O sites and Cu spin-echo decay time are in qualitative and in some cases in quantitative agreement with experiment in underdoped YBa[sub 2]Cu[sub 3]O[sub 6+y]. The temperature dependences of these quantities are typical for the quantum disordered regime with a pseudogap in the spectrum of magnetic excitations. In the Eliashberg formalism the hole-magnon interaction was found to be unable alone to give rise to superconductivity. With inclusion of a moderate interaction with apex oxygen vibrations, high-[Tc]'s are obtained for even frequency d[sub x[sup 2][minus]y[sup 2]] pairing.

• OSTI ID: 6442766
• Report Number(s): CONF-980291--
• Conference Information: Journal Name: International Journal of Modern Physics B Journal Volume: 12:29-31
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
665411 -- Basic Superconductivity Studies-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
BISMUTH COMPOUNDS
BISMUTH OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ENERGY GAP
HIGH-TC SUPERCONDUCTORS
HOLES
MAGNETIC PROPERTIES
MAGNETISM
MATHEMATICAL MODELS
OXIDES
OXYGEN COMPOUNDS
PARAMAGNETISM
PHYSICAL PROPERTIES
RELAXATION
SPIN WAVES
SPIN-LATTICE RELAXATION
SUPERCONDUCTIVITY
SUPERCONDUCTORS
TEMPERATURE DEPENDENCE
TRANSITION ELEMENT COMPOUNDS
TYPE-II SUPERCONDUCTORS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES