| Автор | Harald Niggemann |
| Автор | Gennadi Uimin |
| Автор | Johannes Zittartz |
| Дата выпуска | 1998-06-15 |
| dc.description | We consider thermodynamic properties, e.g. specific heat and magnetic susceptibility, of alternating Heisenberg spin chains. Due to a hidden Ising symmetry, these chains can be decomposed into a set of finite chain fragments. The problem of finding the thermodynamic quantities is effectively separated into two parts. First we deal with finite objects; secondly we can incorporate the fragments into a statistical ensemble. As functions of the coupling constants, the models exhibit special features in the thermodynamic quantities, e.g. the specific heat displays double peaks at low enough temperatures. These features stem from first-order quantum phase transitions at zero temperature, which have been investigated in the first part of this work. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Название | Mixed Heisenberg chains: II. Thermodynamics |
| Тип | paper |
| DOI | 10.1088/0953-8984/10/23/021 |
| Electronic ISSN | 1361-648X |
| Print ISSN | 0953-8984 |
| Журнал | Journal of Physics: Condensed Matter |
| Том | 10 |
| Первая страница | 5217 |
| Последняя страница | 5236 |
| Аффилиация | Harald Niggemann; Institut für Theoretische Physik, Universität zu Köln, Zülpicher Strasse 77, D-50937 Köln, Germany |
| Аффилиация | Gennadi Uimin; Institut für Theoretische Physik, Universität zu Köln, Zülpicher Strasse 77, D-50937 Köln, Germany |
| Аффилиация | Johannes Zittartz; Institut für Theoretische Physik, Universität zu Köln, Zülpicher Strasse 77, D-50937 Köln, Germany |
| Выпуск | 23 |
