| Автор | D J J Farnell |
| Автор | J B Parkinson |
| Дата выпуска | 1994-07-11 |
| dc.description | The coupled-cluster method of quantum many-body theory is applied to 1D and 2D spin- 1/2 systems with nearest-neighbour and next-nearest-neighbour isotropic exchange. Several simple approximation schemes based on a Neel model state are investigated and are found to give satisfactory results in the antiferromagnetic regime. Results are given for the ground-state energy, the order parameter and the sublattice magnetization. We obtain evidence of a phase transition. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Название | A coupled-cluster treatment of spin- 1/2 systems with nearest- and next-nearest-neighbour interactions |
| Тип | paper |
| DOI | 10.1088/0953-8984/6/28/024 |
| Electronic ISSN | 1361-648X |
| Print ISSN | 0953-8984 |
| Журнал | Journal of Physics: Condensed Matter |
| Том | 6 |
| Первая страница | 5521 |
| Последняя страница | 5532 |
| Аффилиация | D J J Farnell; Dept. of Math., Univ. of Manchester Inst. of Sci. & Technol., UK |
| Аффилиация | J B Parkinson; Dept. of Math., Univ. of Manchester Inst. of Sci. & Technol., UK |
| Выпуск | 28 |
