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http://hdl.handle.net/10174/7144
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| Title: | Spin-spectral-weight distribution and energy range of the parent compound La$_2$CuO$_4$ |
| Authors: | Carmelo, José
Araújo, Miguel
Sampaio, Maria
White, Steve |
| Keywords: | modelo de Hubbard
ondas de spin
susceptibilidade magnética
correlações electrónicas |
| Issue Date: | 25-Jun-2012 |
| Publisher: | Europhysics Letters |
| Citation: | Europhysics Letters 98, 67004 (2012) |
| Abstract: | The spectral-weight distribution in recent neutron scattering experiments on the
parent compound La2CuO4 (LCO), which are limited in energy range to about 450meV, is studied
in the framework of the Hubbard model on the square lattice. We find that the higher-energy
weight extends to about 566meV and is located at and near the momentum [!, !]. Our results
confirm that the U/t value suitable to LCO is in the range U/t ! (6, 8). The continuum weight
energy-integrated intensity vanishes or is extremely small at momentum [!, 0]. This behavior of
the intensity is consistent with that of spin waves, which are damped at [!, 0]. |
| URI: | http://hdl.handle.net/10174/7144 |
| Type: | article |
| Appears in Collections: | FIS - Publicações - Artigos em Revistas Nacionais Com Arbitragem Científica
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Departamento de Física /
FIS - Publicações - Artigos em Revistas Nacionais Com Arbitragem Científica /
