Cooper pairing and superconductivity in a spin fluctuation model for high-Tc cuprate superconductors
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| Formato: | Artículo científico |
| Lenguaje: | en |
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Sociedade Brasileira de Física
2002
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| _version_ | 1876438253274398720 |
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| author | Eduardo C. Marino |
| author_facet | Eduardo C. Marino |
| contents | Cooper pairing and superconductivity in a spin fluctuation model for high-Tc cuprate superconductors Eduardo C. Marino Marcello B. Silva Neto Física, Astronomía y Matemáticas We study the formation of Cooper pairs in high-Tc cuprate superconductors within a spin uctuation model for doped quantum Heisenberg antiferromagnets. The charge of the dopants (chargons) is associated to quantum skyrmion excitations of the Cu++ antiferromagnetic spin background. We then compute the quantum skyrmion e effective interaction potential as a function of doping and temperature in order to study charge pairing. It becomes clear that Cooper pair formation is determined by the competition between the spin uctuations of the Cu++ magnetic ions and the spins of the O-- doped holes (spinons). The superconducting transition occurs when the effective potential allows for skyrmion bound states. Our theoretical predictions for the superconducting phase diagram of La2-x Sr x CuO4 and YBa2 Cu3O6+x are in good agreement with experiment. 2002 artículo científico 0103-9733 https://www.redalyc.org/articulo.oa?id=46413506008 en http://www.redalyc.org/revista.oa?id=464 Brazilian Journal of Physics application/pdf Sociedade Brasileira de Física Brazilian Journal of Physics (Brasil) Num.3 Vol.32 |
| format | Artículo científico |
| id | redalyc_46413506008 |
| institution | Redalyc |
| language | en |
| publishDate | 2002 |
| publisher | Sociedade Brasileira de Física |
| spellingShingle | Cooper pairing and superconductivity in a spin fluctuation model for high-Tc cuprate superconductors Eduardo C. Marino Física, Astronomía y Matemáticas Cooper pairing and superconductivity in a spin fluctuation model for high-Tc cuprate superconductors Eduardo C. Marino Marcello B. Silva Neto Física, Astronomía y Matemáticas We study the formation of Cooper pairs in high-Tc cuprate superconductors within a spin uctuation model for doped quantum Heisenberg antiferromagnets. The charge of the dopants (chargons) is associated to quantum skyrmion excitations of the Cu++ antiferromagnetic spin background. We then compute the quantum skyrmion e effective interaction potential as a function of doping and temperature in order to study charge pairing. It becomes clear that Cooper pair formation is determined by the competition between the spin uctuations of the Cu++ magnetic ions and the spins of the O-- doped holes (spinons). The superconducting transition occurs when the effective potential allows for skyrmion bound states. Our theoretical predictions for the superconducting phase diagram of La2-x Sr x CuO4 and YBa2 Cu3O6+x are in good agreement with experiment. 2002 artículo científico 0103-9733 https://www.redalyc.org/articulo.oa?id=46413506008 en http://www.redalyc.org/revista.oa?id=464 Brazilian Journal of Physics application/pdf Sociedade Brasileira de Física Brazilian Journal of Physics (Brasil) Num.3 Vol.32 |
| title | Cooper pairing and superconductivity in a spin fluctuation model for high-Tc cuprate superconductors |
| topic | Física, Astronomía y Matemáticas |
| url | https://www.redalyc.org/articulo.oa?id=46413506008 |