| Автор | Gregory C Psaltakis |
| Дата выпуска | 1998-11-09 |
| dc.description | Doped antiferromagnets, described by a model and a suitable expansion, exhibit a metallic phase-modulated antiferromagnetic ground state close to half-filling. Here we demonstrate that the energy of the latter state is an even periodic function of the external magnetic flux threading the square lattice in an Aharonov-Bohm geometry. The period is equal to the flux quantum entering the Peierls phase factor of the hopping matrix elements. Thus flux quantization and a concomitant finite value of superfluid weight occur along with metallic antiferromagnetism. We argue that in the context of the present effective model, whereby carriers are treated as hard-core bosons, the charge q in the associated flux quantum might be set equal to 2e. Finally, the superconducting transition temperature is related to linearly, in accordance to the generic Kosterlitz-Thouless type of transition in a two-dimensional system, signalling the coherence of the phase fluctuations of the condensate. The calculated dependence of on hole concentration is qualitatively similar to that observed in the high-temperature superconducting cuprates. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Название | Flux quantization and superfluid weight in doped antiferromagnets |
| Тип | paper |
| DOI | 10.1088/0953-8984/10/44/009 |
| Electronic ISSN | 1361-648X |
| Print ISSN | 0953-8984 |
| Журнал | Journal of Physics: Condensed Matter |
| Том | 10 |
| Первая страница | 10011 |
| Последняя страница | 10018 |
| Аффилиация | Gregory C Psaltakis; Department of Physics, University of Crete, and Research Center of Crete, Heraklion, GR-71003, Greece |
| Выпуск | 44 |
