| dc.creator |
Marino Eduardo C. |
|
| dc.creator |
Silva Neto Marcello B. |
|
| dc.date |
2002 |
|
| dc.date.accessioned |
2013-06-01T09:33:53Z |
|
| dc.date.available |
2013-06-01T09:33:53Z |
|
| dc.date.issued |
2013-06-01 |
|
| dc.identifier |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-97332002000400008 |
|
| dc.identifier |
http://www.doaj.org/doaj?func=openurl&genre=article&issn=01039733&date=2002&volume=32&issue=3&spage=710 |
|
| dc.identifier.uri |
http://koha.mediu.edu.my:8181/jspui/handle/123456789/7862 |
|
| dc.description |
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. |
|
| dc.publisher |
Sociedade Brasileira de Física |
|
| dc.source |
Brazilian Journal of Physics |
|
| dc.title |
Cooper pairing and superconductivity in a spin fluctuation model for high-Tc cuprate superconductors |
|