Please use this identifier to cite or link to this item: http://hdl.handle.net/2445/13258
Title: Accurate prediction of large antiferromagnetic interactions in High-Tc HgBa2Can-1CunO2n+2+delta (n = 2,3) superconductor parent compounds
Author: Muñoz Ramos, David
Illas i Riera, Francesc
Moreira, Ibério de Pinho Ribeiro
Keywords: Superconductivitat
Materials
Propietats magnètiques
Interaccions electromagnètiques
Superconductivity
Magnetic properties and materials
Electromagnetic interactions
Issue Date: 2000
Publisher: American Physical Society
Abstract: The in-plane nearest-neighbor Heisenberg magnetic coupling constant, J , of La 2 CuO 4 , Nd 2 CuO 4 , Sr 2 CuO 2 Cl 2 , YBa 2 Cu 3 O 6 , and undoped HgBa 2 Ca n − 1 Cu n O 2 n + 2 + δ ( n = 1 , 2 , 3 ) is calculated from accurate ab initio configuration interaction calculations. For the first four compounds, the theoretical J values are in quantitative agreement with experiment. For the Hg-based compounds the predicted values are − 135 meV ( n = 1 ) and ∼ − 160 meV ( n = 2 , 3 ), the latter being much larger than in previous cases and, for n = 3 , increasing with pressure. Nevertheless, the physics governing J in all these layered cuprates appears to be the same. Moreover, calculations suggest a possible relationship between J and T c .
Note: Reproducció digital del document proporcionada per PROLA i http://dx.doi.org/10.1103/PhysRevLett.84.1579
It is part of: Physical Review Letters, 2000, vol. 84, núm. 7, p. 1579-1582
Related resource: http://dx.doi.org/10.1103/PhysRevLett.84.1579
URI: http://hdl.handle.net/2445/13258
ISSN: 0031-9007
Appears in Collections:Articles publicats en revistes (Ciència dels Materials i Química Física)

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