| Автор | Gregory C Psaltakis |
| Дата выпуска | 1996-07-01 |
| dc.description | We study the Drude weight D and the total optical weight K for a t - t' - J model on a square lattice that exhibits a metallic phase-modulated antiferromagnetic ground state close to half-filling. Within a suitable 1/N expansion that includes leading quantum-fluctuation effects, D and K are found to increase linearly with small hole doping away from the Mott metal - insulator transition point at half-filling. The slow zero-sound velocity near the latter transition identifies with the velocity of the lower-energy branch of the twofold excitation spectrum. At higher doping values, D and K eventually saturate and then start to decrease. These features are in qualitative agreement with optical conductivity measurements in doped antiferromagnets. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Название | Drude weight and total optical weight in a t - t' - J model |
| Тип | paper |
| DOI | 10.1088/0953-8984/8/27/017 |
| Electronic ISSN | 1361-648X |
| Print ISSN | 0953-8984 |
| Журнал | Journal of Physics: Condensed Matter |
| Том | 8 |
| Первая страница | 5089 |
| Последняя страница | 5100 |
| Аффилиация | Gregory C Psaltakis; Department of Physics, University of Crete, and Research Centre of Crete, Heraklion, GR-71003, Greece |
| Выпуск | 27 |
