| Автор | D J Bukman |
| Автор | J M J van Leeuwen |
| Дата выпуска | 1991-12-16 |
| dc.description | The phase diagram of the spin 1/2 XXZ model is examined for two different geometries, which can be changed from two- to three-dimensional. The first of these consists of an infinite stack of simple quadratic layers with a variable inter-layer coupling, where the ratio of the inter-layer and intra-layer couplings varies between zero and one. Second, the authors consider a slab geometry consisting of n such layers, with equal couplings in all directions. For both geometries they use the cluster variation method for two-spin clusters to construct the phase diagram of the model, and they examine the changes that take place as the system changes from two- to three-dimensional. For the slab geometry they also calculate the order parameter profile near T<sub>c</sub>. It turns out that Dirichlet boundary conditions for the related superfluid wavefunction are most realistic. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Название | The phase diagram of the XXZ model for slab and layered geometries |
| Тип | paper |
| DOI | 10.1088/0953-8984/3/50/006 |
| Electronic ISSN | 1361-648X |
| Print ISSN | 0953-8984 |
| Журнал | Journal of Physics: Condensed Matter |
| Том | 3 |
| Первая страница | 9995 |
| Последняя страница | 10020 |
| Аффилиация | D J Bukman; Inst. Lorentz, Rijksuniv. te Leiden, Netherlands |
| Аффилиация | J M J van Leeuwen; Inst. Lorentz, Rijksuniv. te Leiden, Netherlands |
| Выпуск | 50 |
